diff --git a/base/src/main/java/de/staropensource/sosengine/base/data/versioning/FourNumberVersioningSystem.java b/base/src/main/java/de/staropensource/sosengine/base/data/versioning/FourNumberVersioningSystem.java
new file mode 100644
index 0000000..95d22d5
--- /dev/null
+++ b/base/src/main/java/de/staropensource/sosengine/base/data/versioning/FourNumberVersioningSystem.java
@@ -0,0 +1,157 @@
+/*
+ * STAROPENSOURCE ENGINE SOURCE FILE
+ * Copyright (c) 2024 The StarOpenSource Engine Contributors
+ * Licensed under the GNU Affero General Public License v3
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.staropensource.sosengine.base.data.versioning;
+
+import de.staropensource.sosengine.base.exceptions.IncompatibleVersioningSystemException;
+import de.staropensource.sosengine.base.exceptions.InvalidVersionStringException;
+import de.staropensource.sosengine.base.types.VersioningSystem;
+import de.staropensource.sosengine.base.utility.Miscellaneous;
+import lombok.Getter;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Range;
+
+/**
+ * Represents a four-numbered versioning system, where an application or work is versioning by four arbitrary numbers.
+ *
+ * @since 1-alpha1
+ */
+@SuppressWarnings({ "unused", "JavadocDeclaration", "JavadocBlankLines" })
+@Getter
+public final class FourNumberVersioningSystem implements VersioningSystem {
+    /**
+     * Contains the 1. number vector.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the 1. number vector.
+     *
+     * @return 1. number vector
+     * @since 1-alpha1
+     */
+    private final int number1;
+
+    /**
+     * Contains the 2. number vector.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the 2. number vector.
+     *
+     * @return 2. number vector
+     * @since 1-alpha1
+     */
+    private final int number2;
+
+    /**
+     * Contains the 3. number vector.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the 3. number vector.
+     *
+     * @return 3. number vector
+     * @since 1-alpha1
+     */
+    private final int number3;
+
+    /**
+     * Contains the 4. number vector.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the 4. number vector.
+     *
+     * @return 4. number vector
+     * @since 1-alpha1
+     */
+    private final int number4;
+
+    /** {@inheritDoc} */
+    @Override
+    public @NotNull String getName() {
+        return "n4";
+    }
+
+    /**
+     * Constructor.
+     *
+     * @param versionString version string to parse
+     * @throws InvalidVersionStringException if the version string is invalid
+     */
+    public FourNumberVersioningSystem(@NotNull String versionString) throws InvalidVersionStringException {
+        String[] separatorList = new String[]{ ".", "-" };
+        String separator = Miscellaneous.getSeparator(versionString, separatorList, 3);
+
+        // Escape separator or throw error if invalid
+        switch (separator) {
+            case "." -> separator = "\\.";
+            case null -> throw new InvalidVersionStringException(this, versionString, "No matching separator could be found. Required are either three dots ('.') or hyphens ('-').");
+            default -> {}
+        }
+
+        // Split the version string at every separator
+        String[] versionStringSplit = versionString.split(separator);
+
+        // Convert to integers
+        try {
+            this.number1 = Integer.parseUnsignedInt(versionStringSplit[0]);
+            this.number2 = Integer.parseUnsignedInt(versionStringSplit[1]);
+            this.number3 = Integer.parseUnsignedInt(versionStringSplit[2]);
+            this.number4 = Integer.parseUnsignedInt(versionStringSplit[3]);
+        } catch (NumberFormatException exception) {
+            throw new InvalidVersionStringException(this, versionString, "Failed converting one of the vectors to an integer.", exception);
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Range(from = 0, to = 2)
+    @Override
+    public int compare(@NotNull VersioningSystem versionInterface) throws IncompatibleVersioningSystemException {
+        if (versionInterface instanceof FourNumberVersioningSystem version) {
+            if (version.getNumber1() < number1)
+                return 0;
+            if (version.getNumber1() > number1)
+                return 2;
+
+            if (version.getNumber2() < number2)
+                return 0;
+            if (version.getNumber2() > number2)
+                return 2;
+
+            if (version.getNumber3() < number3)
+                return 0;
+            if (version.getNumber3() > number3)
+                return 2;
+
+            if (version.getNumber4() < number4)
+                return 0;
+            if (version.getNumber4() > number4)
+                return 2;
+
+            return 1;
+
+        } else
+            throw new IncompatibleVersioningSystemException(this, versionInterface);
+    }
+}
diff --git a/base/src/main/java/de/staropensource/sosengine/base/data/versioning/SemanticVersioningSystem.java b/base/src/main/java/de/staropensource/sosengine/base/data/versioning/SemanticVersioningSystem.java
new file mode 100644
index 0000000..e90e03e
--- /dev/null
+++ b/base/src/main/java/de/staropensource/sosengine/base/data/versioning/SemanticVersioningSystem.java
@@ -0,0 +1,226 @@
+/*
+ * STAROPENSOURCE ENGINE SOURCE FILE
+ * Copyright (c) 2024 The StarOpenSource Engine Contributors
+ * Licensed under the GNU Affero General Public License v3
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.staropensource.sosengine.base.data.versioning;
+
+import de.staropensource.sosengine.base.exceptions.IncompatibleVersioningSystemException;
+import de.staropensource.sosengine.base.exceptions.InvalidVersionStringException;
+import de.staropensource.sosengine.base.types.VersioningSystem;
+import de.staropensource.sosengine.base.utility.Miscellaneous;
+import lombok.Getter;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.jetbrains.annotations.Range;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Represents the semantic versioning system (version 2.0.0), where an application or work is versioning by a MAJOR version, a MINOR version, a PATCH version and optionally, a pre-release vector and a build number.
+ *
+ * @since 1-alpha1
+ */
+@SuppressWarnings({ "unused", "JavadocDeclaration", "JavadocBlankLines" })
+@Getter
+public final class SemanticVersioningSystem implements VersioningSystem {
+    /**
+     * Contains the MAJOR vector.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the MAJOR vector.
+     *
+     * @return MAJOR vector
+     * @since 1-alpha1
+     */
+    private final int major;
+
+    /**
+     * Contains the MINOR vector.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the MINOR vector.
+     *
+     * @return MINOR vector
+     * @since 1-alpha1
+     */
+    private final int minor;
+
+    /**
+     * Contains the PATCH vector.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the PATCH vector.
+     *
+     * @return PATCH vector
+     * @since 1-alpha1
+     */
+    private final int patch;
+
+    /**
+     * Contains the PRERELEASE vector.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the PRERELEASE vector.
+     *
+     * @return PRERELEASE vector
+     * @since 1-alpha1
+     */
+    @Nullable
+    private final String prerelease;
+
+    /**
+     * Contains the BUILD vector.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the BUILD vector.
+     *
+     * @return BUILD vector
+     * @since 1-alpha1
+     */
+    private final int build;
+
+    /** {@inheritDoc} */
+    @Override
+    public @NotNull String getName() {
+        return "Semantic";
+    }
+
+    /**
+     * Constructor.
+     *
+     * @param versionString version string to parse
+     * @throws InvalidVersionStringException if the version string is invalid
+     */
+    public SemanticVersioningSystem(@NotNull String versionString) throws InvalidVersionStringException {
+        String[] separatorList = new String[]{ "." };
+        String separator = Miscellaneous.getSeparator(versionString, separatorList, 2);
+
+        // Escape separator or throw error if invalid
+        switch (separator) {
+            case "." -> separator = "\\.";
+            case null -> throw new InvalidVersionStringException(this, versionString, "No matching separator could be found. Required are two dots ('.').");
+            default -> {}
+        }
+
+        // Split the version string at every separator
+        List<String> versionStringSplit = new ArrayList<>(Arrays.stream(versionString.split(separator)).toList());
+
+        // Get pre-release and build vectors
+        String build = null;
+        String prerelease = null;
+        if (versionStringSplit.get(2).contains("+")) {  // Build vector
+            int position = versionStringSplit.get(2).indexOf("+");
+            build = versionStringSplit.get(2).substring(position + 1);
+            versionStringSplit.set(2, versionStringSplit.get(2).substring(0, position));
+        }
+        if (versionStringSplit.get(2).contains("-")) {
+            int position = versionStringSplit.get(2).indexOf("-");
+            prerelease = versionStringSplit.get(2).substring(position + 1);
+            versionStringSplit.set(2, versionStringSplit.get(2).substring(0, position));
+        }
+
+        // Convert to integers
+        try {
+            this.major = Integer.parseUnsignedInt(versionStringSplit.get(0));
+            this.minor = Integer.parseUnsignedInt(versionStringSplit.get(1));
+            this.patch = Integer.parseUnsignedInt(versionStringSplit.get(2));
+            this.prerelease = prerelease;
+            if (build == null)
+                this.build = 0;
+            else
+                this.build = Integer.parseUnsignedInt(build);
+        } catch (NumberFormatException exception) {
+            throw new InvalidVersionStringException(this, versionString, "Failed converting one of the vectors to an integer.", exception);
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Range(from = 0, to = 2)
+    @Override
+    public int compare(@NotNull VersioningSystem versionInterface) throws IncompatibleVersioningSystemException {
+        if (versionInterface instanceof SemanticVersioningSystem version) {
+            if (version.getMajor() < major)
+                return 0;
+            if (version.getMajor() > major)
+                return 2;
+
+            if (version.getMinor() < minor)
+                return 0;
+            if (version.getMinor() > minor)
+                return 2;
+
+            if (version.getPatch() < patch)
+                return 0;
+            if (version.getPatch() > patch)
+                return 2;
+
+            if (version.getPrerelease() == null && prerelease != null)
+                return 2;
+            else if (version.getPrerelease() != null && prerelease == null)
+                return 0;
+            else if (version.getPrerelease() != null)
+                switch (prerelease) {
+                    case "alpha" -> {
+                        switch (version.getPrerelease()) {
+                            case "beta", "releasecandidate", "release-candidate", "rc" -> {
+                                return 2;
+                            }
+                        }
+                    }
+                    case "beta" -> {
+                        switch (version.getPrerelease()) {
+                            case "alpha" -> {
+                                return 0;
+                            }
+                            case "releasecandidate", "release-candidate", "rc" -> {
+                                return 2;
+                            }
+                        }
+                    }
+                    case "releasecandidate", "release-candidate", "rc" -> {
+                        switch (version.getPrerelease()) {
+                            case "alpha", "beta" -> {
+                                return 0;
+                            }
+                        }
+                    }
+                }
+
+            if (version.getBuild() < build)
+                return 0;
+            if (version.getBuild() > build)
+                return 2;
+
+            return 1;
+
+        } else
+            throw new IncompatibleVersioningSystemException(this, versionInterface);
+    }
+}
diff --git a/base/src/main/java/de/staropensource/sosengine/base/data/versioning/StarOpenSourceVersioningSystem.java b/base/src/main/java/de/staropensource/sosengine/base/data/versioning/StarOpenSourceVersioningSystem.java
new file mode 100644
index 0000000..1b92c6d
--- /dev/null
+++ b/base/src/main/java/de/staropensource/sosengine/base/data/versioning/StarOpenSourceVersioningSystem.java
@@ -0,0 +1,266 @@
+/*
+ * STAROPENSOURCE ENGINE SOURCE FILE
+ * Copyright (c) 2024 The StarOpenSource Engine Contributors
+ * Licensed under the GNU Affero General Public License v3
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.staropensource.sosengine.base.data.versioning;
+
+import de.staropensource.sosengine.base.exceptions.IncompatibleVersioningSystemException;
+import de.staropensource.sosengine.base.exceptions.InvalidVersionStringException;
+import de.staropensource.sosengine.base.types.VersionType;
+import de.staropensource.sosengine.base.types.VersioningSystem;
+import lombok.Getter;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.jetbrains.annotations.Range;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+
+/**
+ * Represents the StarOpenSource versioning system (version 2), where an application or work is versioning by a VERSION vector, a TYPE version type, a TYPERELEASE vector and optionally, a fork vector and a companion vector.
+ *
+ * @since 1-alpha1
+ */
+@SuppressWarnings({ "unused", "JavadocDeclaration", "JavadocBlankLines" })
+@Getter
+public final class StarOpenSourceVersioningSystem implements VersioningSystem {
+    /**
+     * Contains the VERSION vector.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the VERSION vector.
+     *
+     * @return VERSION vector
+     * @since 1-alpha1
+     */
+    private final int version;
+
+    /**
+     * Contains the TYPE vector.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the TYPE vector.
+     *
+     * @return TYPE vector
+     * @since 1-alpha1
+     */
+    private final VersionType type;
+
+    /**
+     * Contains the TYPERELEASE vector.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the TYPERELEASE vector.
+     *
+     * @return TYPERELEASE vector
+     * @since 1-alpha1
+     */
+    private final int typerelease;
+
+    /**
+     * Contains the COMPANION vector.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the COMPANION vector.
+     *
+     * @return COMPANION vector
+     * @since 1-alpha1
+     */
+    @Nullable
+    private final String companion;
+
+    /**
+     * Contains the FORK vector.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the FORK vector.
+     *
+     * @return FORK vector
+     * @since 1-alpha1
+     */
+    private final String fork;
+
+    /** {@inheritDoc} */
+    @Override
+    public @NotNull String getName() {
+        return "StarOpenSource";
+    }
+
+    /**
+     * Constructor.
+     *
+     * @param versionString version string to parse
+     * @throws InvalidVersionStringException if the version string is invalid
+     */
+    public StarOpenSourceVersioningSystem(@NotNull String versionString) throws InvalidVersionStringException {
+        // Split the version string at every separator
+        StringBuilder charSequence = new StringBuilder();
+        /*
+         * 0 = 'v'
+         * 1 = version vector
+         * 3 = type vector
+         * 4 = typerelease vector
+         * 5 = companion vector
+         * 6 = fork vector
+         */
+        int parsingId = 0;
+        List<String> versionStringSplit = new ArrayList<>();
+        String companion = null;
+        String fork = null;
+
+        // Iterate through all chraracters
+        for (Character character : versionString.toCharArray()) {
+            switch (parsingId) {
+                case 0 -> {  // 'v' character
+                    if (character != 'v')
+                        throw new InvalidVersionStringException(this, versionString, "Does not start with the character 'v'");
+                    parsingId++;
+                }
+                case 1 -> {  // Version vector
+                    if (character == '-') {
+                        versionStringSplit.add(charSequence.toString());
+                        charSequence = new StringBuilder();
+                        parsingId++;
+                    } else
+                        charSequence.append(character);
+                }
+                case 2 -> {  // Type vector
+                    charSequence.append(character);
+
+                    if (charSequence.toString().equals("alpha") || charSequence.toString().equals("beta") || charSequence.toString().equals("release")) {
+                        versionStringSplit.add(charSequence.toString());
+                        charSequence = new StringBuilder();
+                        parsingId++;
+                    } else if (versionStringSplit.size() == 2 && versionStringSplit.get(1).contains("releasec") && charSequence.toString().equals("andidate")) {
+                        versionStringSplit.set(1, versionStringSplit.get(1) + charSequence);
+                        charSequence = new StringBuilder();
+                        parsingId++;
+                    }
+                }
+                case 3 -> {  // Typerelease vector
+                    if (character == '-' || character == '+') {
+                        versionStringSplit.add(charSequence.toString());
+                        charSequence = new StringBuilder();
+                        parsingId++;
+                        if (character == '+')
+                            parsingId++;
+                    } else
+                        if (character == 'c' && versionStringSplit.get(1).equals("release")) {
+                            versionStringSplit.set(1, versionStringSplit.get(1) + character);
+                            parsingId--;
+                        } else
+                            charSequence.append(character);
+                }
+                case 4 -> {  // Fork vector
+                    if (character == '+') {
+                        fork = charSequence.toString();
+                        charSequence = new StringBuilder();
+                        parsingId++;
+                    } else
+                        charSequence.append(character);
+                }
+                case 5 -> // Companion vector
+                        charSequence.append(character);
+            }
+        }
+
+        switch (parsingId) {
+            case 0, 1, 2 -> throw new InvalidVersionStringException(this, versionString, "Required vectors not found");
+            case 3 -> {
+                if (charSequence.isEmpty())
+                    throw new InvalidVersionStringException(this, versionString, "Required vectors not found");
+                else {
+                    if (versionStringSplit.size() == 2 && versionStringSplit.get(1).contains("releasec") && charSequence.toString().equals("andidate")) {
+                        versionStringSplit.set(1, versionStringSplit.get(1) + charSequence);
+                    } else
+                        versionStringSplit.add(charSequence.toString());
+                }
+            }
+            case 5 -> {
+                if (charSequence.isEmpty())
+                    throw new InvalidVersionStringException(this, versionString, "Fork vector not found");
+                else
+                    fork = charSequence.toString();
+            }
+            case 6 -> {
+                if (charSequence.isEmpty())
+                    throw new InvalidVersionStringException(this, versionString, "Companion vector not found");
+                else
+                    companion = charSequence.toString();
+            }
+        }
+
+        // Rewrite type
+        if (versionStringSplit.get(1).equals("releasecandidate"))
+            versionStringSplit.set(1, "RELEASE_CANDIDATE");
+        else
+            versionStringSplit.set(1, versionStringSplit.get(1).toUpperCase(Locale.ROOT));
+
+
+        // Update variables
+        try {
+            this.version = Integer.parseUnsignedInt(versionStringSplit.get(0));
+            this.type = VersionType.valueOf(versionStringSplit.get(1));
+            this.typerelease = Integer.parseUnsignedInt(versionStringSplit.get(2));
+            this.companion = companion;
+            this.fork = fork;
+        } catch (NumberFormatException exception) {
+            throw new InvalidVersionStringException(this, versionString, "Failed converting one of the vectors to an integer.", exception);
+        }
+
+        if (this.version == 0)
+            throw new InvalidVersionStringException(this, versionString, "The version vector must start at 1.");
+    }
+
+    /** {@inheritDoc} */
+    @Range(from = 0, to = 2)
+    @Override
+    public int compare(@NotNull VersioningSystem versionInterface) throws IncompatibleVersioningSystemException {
+        if (versionInterface instanceof StarOpenSourceVersioningSystem versionCompare) {
+            if (versionCompare.getVersion() < this.version)
+                return 0;
+            if (versionCompare.getVersion() > this.version)
+                return 2;
+
+            if (type.compareTo(versionCompare.getType()) > 0)
+                return 0;
+            if (type.compareTo(versionCompare.getType()) < 0)
+                return 2;
+
+            if (versionCompare.getTyperelease() < typerelease)
+                return 0;
+            if (versionCompare.getTyperelease() > typerelease)
+                return 2;
+
+            return 1;
+
+        } else
+            throw new IncompatibleVersioningSystemException(this, versionInterface);
+    }
+}
diff --git a/base/src/main/java/de/staropensource/sosengine/base/data/versioning/ThreeNumberVersioningSystem.java b/base/src/main/java/de/staropensource/sosengine/base/data/versioning/ThreeNumberVersioningSystem.java
new file mode 100644
index 0000000..fa1cfe7
--- /dev/null
+++ b/base/src/main/java/de/staropensource/sosengine/base/data/versioning/ThreeNumberVersioningSystem.java
@@ -0,0 +1,138 @@
+/*
+ * STAROPENSOURCE ENGINE SOURCE FILE
+ * Copyright (c) 2024 The StarOpenSource Engine Contributors
+ * Licensed under the GNU Affero General Public License v3
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.staropensource.sosengine.base.data.versioning;
+
+import de.staropensource.sosengine.base.exceptions.IncompatibleVersioningSystemException;
+import de.staropensource.sosengine.base.exceptions.InvalidVersionStringException;
+import de.staropensource.sosengine.base.types.VersioningSystem;
+import de.staropensource.sosengine.base.utility.Miscellaneous;
+import lombok.Getter;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Range;
+
+/**
+ * Represents a three-numbered versioning system, where an application or work is versioning by three arbitrary numbers.
+ *
+ * @since 1-alpha1
+ */
+@SuppressWarnings({ "unused", "JavadocDeclaration", "JavadocBlankLines" })
+@Getter
+public final class ThreeNumberVersioningSystem implements VersioningSystem {
+    /**
+     * Contains the 1. number vector.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the 1. number vector.
+     *
+     * @return 1. number vector
+     * @since 1-alpha1
+     */
+    private final int number1;
+
+    /**
+     * Contains the 2. number vector.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the 2. number vector.
+     *
+     * @return 2. number vector
+     * @since 1-alpha1
+     */
+    private final int number2;
+
+    /**
+     * Contains the 3. number vector.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the 3. number vector.
+     *
+     * @return 3. number vector
+     * @since 1-alpha1
+     */
+    private final int number3;
+
+    /** {@inheritDoc} */
+    @Override
+    public @NotNull String getName() {
+        return "n3";
+    }
+
+    /**
+     * Constructor.
+     *
+     * @param versionString version string to parse
+     * @throws InvalidVersionStringException if the version string is invalid
+     */
+    public ThreeNumberVersioningSystem(@NotNull String versionString) throws InvalidVersionStringException {
+        String[] separatorList = new String[]{ ".", "-" };
+        String separator = Miscellaneous.getSeparator(versionString, separatorList, 2);
+
+        // Escape separator or throw error if invalid
+        switch (separator) {
+            case "." -> separator = "\\.";
+            case null -> throw new InvalidVersionStringException(this, versionString, "No matching separator could be found. Required are either two dots ('.') or hyphens ('-').");
+            default -> {}
+        }
+
+        // Split the version string at every separator
+        String[] versionStringSplit = versionString.split(separator);
+
+        // Convert to integers
+        try {
+            this.number1 = Integer.parseUnsignedInt(versionStringSplit[0]);
+            this.number2 = Integer.parseUnsignedInt(versionStringSplit[1]);
+            this.number3 = Integer.parseUnsignedInt(versionStringSplit[2]);
+        } catch (NumberFormatException exception) {
+            throw new InvalidVersionStringException(this, versionString, "Failed converting one of the vectors to an integer.", exception);
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Range(from = 0, to = 2)
+    @Override
+    public int compare(@NotNull VersioningSystem versionInterface) throws IncompatibleVersioningSystemException {
+        if (versionInterface instanceof ThreeNumberVersioningSystem version) {
+            if (version.getNumber1() < number1)
+                return 0;
+            if (version.getNumber1() > number1)
+                return 2;
+
+            if (version.getNumber2() < number2)
+                return 0;
+            if (version.getNumber2() > number2)
+                return 2;
+
+            if (version.getNumber3() < number3)
+                return 0;
+            if (version.getNumber3() > number3)
+                return 2;
+
+            return 1;
+
+        } else
+            throw new IncompatibleVersioningSystemException(this, versionInterface);
+    }
+}
diff --git a/base/src/main/java/de/staropensource/sosengine/base/data/versioning/TwoNumberVersioningSystem.java b/base/src/main/java/de/staropensource/sosengine/base/data/versioning/TwoNumberVersioningSystem.java
new file mode 100644
index 0000000..da87d6b
--- /dev/null
+++ b/base/src/main/java/de/staropensource/sosengine/base/data/versioning/TwoNumberVersioningSystem.java
@@ -0,0 +1,119 @@
+/*
+ * STAROPENSOURCE ENGINE SOURCE FILE
+ * Copyright (c) 2024 The StarOpenSource Engine Contributors
+ * Licensed under the GNU Affero General Public License v3
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.staropensource.sosengine.base.data.versioning;
+
+import de.staropensource.sosengine.base.exceptions.IncompatibleVersioningSystemException;
+import de.staropensource.sosengine.base.exceptions.InvalidVersionStringException;
+import de.staropensource.sosengine.base.types.VersioningSystem;
+import de.staropensource.sosengine.base.utility.Miscellaneous;
+import lombok.Getter;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Range;
+
+/**
+ * Represents a two-numbered versioning system, where an application or work is versioning by two arbitrary numbers.
+ *
+ * @since 1-alpha1
+ */
+@SuppressWarnings({ "unused", "JavadocDeclaration", "JavadocBlankLines" })
+@Getter
+public final class TwoNumberVersioningSystem implements VersioningSystem {
+    /**
+     * Contains the 1. number vector.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the 1. number vector.
+     *
+     * @return 1. number vector
+     * @since 1-alpha1
+     */
+    private final int number1;
+
+    /**
+     * Contains the 2. number vector.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the 2. number vector.
+     *
+     * @return 2. number vector
+     * @since 1-alpha1
+     */
+    private final int number2;
+
+    /** {@inheritDoc} */
+    @Override
+    public @NotNull String getName() {
+        return "n2";
+    }
+
+    /**
+     * Constructor.
+     *
+     * @param versionString version string to parse
+     * @throws InvalidVersionStringException if the version string is invalid
+     */
+    public TwoNumberVersioningSystem(@NotNull String versionString) throws InvalidVersionStringException {
+        String[] separatorList = new String[]{ ".", "-" };
+        String separator = Miscellaneous.getSeparator(versionString, separatorList, 1);
+
+        // Escape separator or throw error if invalid
+        switch (separator) {
+            case "." -> separator = "\\.";
+            case null -> throw new InvalidVersionStringException(this, versionString, "No matching separator could be found. Required are either one dot ('.') or hyphen ('-').");
+            default -> {}
+        }
+
+        // Split the version string at every separator
+        String[] versionStringSplit = versionString.split(separator);
+
+        // Convert to integers
+        try {
+            this.number1 = Integer.parseUnsignedInt(versionStringSplit[0]);
+            this.number2 = Integer.parseUnsignedInt(versionStringSplit[1]);
+        } catch (NumberFormatException exception) {
+            throw new InvalidVersionStringException(this, versionString, "Failed converting one of the vectors to an integer.", exception);
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Range(from = 0, to = 2)
+    @Override
+    public int compare(@NotNull VersioningSystem versionInterface) throws IncompatibleVersioningSystemException {
+        if (versionInterface instanceof TwoNumberVersioningSystem version) {
+            if (version.getNumber1() < number1)
+                return 0;
+            if (version.getNumber1() > number1)
+                return 2;
+
+            if (version.getNumber2() < number2)
+                return 0;
+            if (version.getNumber2() > number2)
+                return 2;
+
+            return 1;
+
+        } else
+            throw new IncompatibleVersioningSystemException(this, versionInterface);
+    }
+}
diff --git a/base/src/main/java/de/staropensource/sosengine/base/exceptions/IncompatibleVersioningSystemException.java b/base/src/main/java/de/staropensource/sosengine/base/exceptions/IncompatibleVersioningSystemException.java
new file mode 100644
index 0000000..f2c4681
--- /dev/null
+++ b/base/src/main/java/de/staropensource/sosengine/base/exceptions/IncompatibleVersioningSystemException.java
@@ -0,0 +1,34 @@
+/*
+ * STAROPENSOURCE ENGINE SOURCE FILE
+ * Copyright (c) 2024 The StarOpenSource Engine Contributors
+ * Licensed under the GNU Affero General Public License v3
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.staropensource.sosengine.base.exceptions;
+
+import de.staropensource.sosengine.base.types.VersioningSystem;
+
+/**
+ * Represents an exception caused by supplying an invalid or unexpected versioning system.
+ *
+ * @since 1-alpha1
+ */
+@SuppressWarnings({ "unused" })
+public class IncompatibleVersioningSystemException extends Exception {
+    public IncompatibleVersioningSystemException(VersioningSystem required, VersioningSystem found) {
+        super("The versioning system " + required + " is incompatible with " + found);
+    }
+}
diff --git a/base/src/main/java/de/staropensource/sosengine/base/exceptions/InvalidVersionStringException.java b/base/src/main/java/de/staropensource/sosengine/base/exceptions/InvalidVersionStringException.java
new file mode 100644
index 0000000..a58d7b4
--- /dev/null
+++ b/base/src/main/java/de/staropensource/sosengine/base/exceptions/InvalidVersionStringException.java
@@ -0,0 +1,101 @@
+/*
+ * STAROPENSOURCE ENGINE SOURCE FILE
+ * Copyright (c) 2024 The StarOpenSource Engine Contributors
+ * Licensed under the GNU Affero General Public License v3
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.staropensource.sosengine.base.exceptions;
+
+import de.staropensource.sosengine.base.types.VersioningSystem;
+import lombok.Getter;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+
+/**
+ * Represents an exception caused by an invalid version string.
+ *
+ * @since 1-alpha1
+ */
+@SuppressWarnings({ "unused", "JavadocDeclaration", "JavadocBlankLines" })
+@Getter
+public class InvalidVersionStringException extends Exception {
+    /**
+     * Contains the throwable supplied to the constructor.
+     *
+     * @since 1-alpha1
+     *
+     * -- GETTER --
+     * Returns the throwable supplied by the constructor.
+     *
+     * @return throwable
+     * @since 1-alpha1
+     */
+    @Nullable
+    Throwable throwable;
+
+    /**
+     * Constructor.
+     *
+     * @param versioningSystem versioning system that is unable to parse version strings
+     * @param versionString   version string {@code a}
+     * @param message          some error message
+     * @param throwable        throwable that caused the parsing error
+     * @since 1-alpha1
+     */
+    public InvalidVersionStringException(@NotNull VersioningSystem versioningSystem, @NotNull String versionString, @NotNull String message, @NotNull Throwable throwable) {
+        super("Versioning system " + versioningSystem.getName() + " can't parse version string \"" + versionString + "\": " + message);
+        this.throwable = throwable;
+    }
+
+    /**
+     * Constructor.
+     *
+     * @param versioningSystem versioning system that is unable to parse version strings
+     * @param versionString   version string {@code a}
+     * @param message          some error message
+     * @since 1-alpha1
+     */
+    public InvalidVersionStringException(@NotNull VersioningSystem versioningSystem, @NotNull String versionString, @NotNull String message) {
+        super("Versioning system " + versioningSystem.getName() + " can't parse version string \"" + versionString + "\": " + message);
+        throwable = null;
+    }
+
+    /**
+     * Constructor.
+     *
+     * @param versioningSystem versioning system that is unable to parse version strings
+     * @param versionString   version string {@code a}
+     * @param throwable        throwable that caused the parsing error
+     * @since 1-alpha1
+     */
+    public InvalidVersionStringException(@NotNull VersioningSystem versioningSystem, @NotNull String versionString, @NotNull Throwable throwable) {
+        super("Versioning system " + versioningSystem.getName() + " can't parse version string \"" + versionString + "\"");
+        this.throwable = throwable;
+    }
+
+    /**
+     * Constructor.
+     *
+     * @param versioningSystem versioning system that is unable to parse version strings
+     * @param versionString   version string {@code a}
+     * @since 1-alpha1
+     */
+    public InvalidVersionStringException(@NotNull VersioningSystem versioningSystem, @NotNull String versionString) {
+        super("Versioning system " + versioningSystem.getName() + " can't parse version string \"" + versionString + "\"");
+        this.throwable = null;
+    }
+}
diff --git a/base/src/main/java/de/staropensource/sosengine/base/types/VersionType.java b/base/src/main/java/de/staropensource/sosengine/base/types/VersionType.java
index 2b8ac4b..4d54316 100644
--- a/base/src/main/java/de/staropensource/sosengine/base/types/VersionType.java
+++ b/base/src/main/java/de/staropensource/sosengine/base/types/VersionType.java
@@ -20,10 +20,12 @@
 package de.staropensource.sosengine.base.types;
 
 import de.staropensource.sosengine.base.data.info.EngineInformation;
+import de.staropensource.sosengine.base.data.versioning.StarOpenSourceVersioningSystem;
 
 /**
- * Provides all available version types.
+ * Provides all available version types specified in the StarOpenSource Versioning System v2.
  *
+ * @see StarOpenSourceVersioningSystem
  * @see EngineInformation#versioningType
  * @since 1-alpha0
  */
diff --git a/base/src/main/java/de/staropensource/sosengine/base/types/VersioningSystem.java b/base/src/main/java/de/staropensource/sosengine/base/types/VersioningSystem.java
new file mode 100644
index 0000000..48a668c
--- /dev/null
+++ b/base/src/main/java/de/staropensource/sosengine/base/types/VersioningSystem.java
@@ -0,0 +1,50 @@
+/*
+ * STAROPENSOURCE ENGINE SOURCE FILE
+ * Copyright (c) 2024 The StarOpenSource Engine Contributors
+ * Licensed under the GNU Affero General Public License v3
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.staropensource.sosengine.base.types;
+
+import de.staropensource.sosengine.base.exceptions.IncompatibleVersioningSystemException;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Range;
+
+/**
+ * An interface used for implementing different versioning systems.
+ *
+ * @since 1-alpha1
+ */
+@SuppressWarnings({ "unused" })
+public interface VersioningSystem {
+    /**
+     * Returns the name of this versioning system.
+     *
+     * @since 1-alpha1
+     */
+    @NotNull
+    String getName();
+
+    /**
+     * Compares a version with another version.
+     *
+     * @param version the version to compare against
+     * @return smaller = {@code 0}, equal = {@code 1}, bigger = {@code 2}
+     * @since 1-alpha1
+     */
+    @Range(from = 0, to = 2)
+    int compare(@NotNull VersioningSystem version) throws IncompatibleVersioningSystemException;
+}
diff --git a/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/FourNumberVersioningSystemTest.java b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/FourNumberVersioningSystemTest.java
new file mode 100644
index 0000000..92c57cd
--- /dev/null
+++ b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/FourNumberVersioningSystemTest.java
@@ -0,0 +1,74 @@
+/*
+ * STAROPENSOURCE ENGINE SOURCE FILE
+ * Copyright (c) 2024 The StarOpenSource Engine Contributors
+ * Licensed under the GNU Affero General Public License v3
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.staropensource.sosengine.base.srctests.data.versioning;
+
+import de.staropensource.sosengine.base.data.versioning.FourNumberVersioningSystem;
+import de.staropensource.sosengine.base.exceptions.InvalidVersionStringException;
+import de.staropensource.sosengine.unittests.UnitLogger;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.fail;
+
+/**
+ * Tests the class {@link FourNumberVersioningSystem}.
+ */
+@SuppressWarnings({ "unused" })
+@DisplayName("SemanticVersioningSystem")
+public class FourNumberVersioningSystemTest {
+    /**
+     * The unit logger for this instance.
+     */
+    private static final UnitLogger logger = new UnitLogger(FourNumberVersioningSystemTest.class);
+    private static final Logger log = LoggerFactory.getLogger(FourNumberVersioningSystemTest.class);
+
+    /**
+     * Tests the method {@code compare}.
+     */
+    @ParameterizedTest
+    @DisplayName("compare")
+    @CsvSource({
+            "1.1.0.0, 1.0.0.1, 0",
+            "1.1.0.0, 1.0.1.0, 0",
+            "1.1.0.0, 1.0.1.1, 0",
+            "1.1.0.0, 1.1.0.0, 1",
+            "1.1.0.0, 1.1.0.1, 2",
+            "1.1.0.0, 1.1.1.0, 2",
+            "1.1.0.0, 1.1.1.1, 2",
+    })
+    void testCompare(String a, String b, int expected) throws Throwable {
+        logger.testCall("testCompare", a, b, expected);
+
+        try {
+            assertEquals(expected, new FourNumberVersioningSystem(a).compare(new FourNumberVersioningSystem(b)));
+        } catch (InvalidVersionStringException exception) {
+            logger.error("Got InvalidVersionStringException: " + exception.getMessage());
+            if (exception.getThrowable() != null) {
+                logger.error("Original stack trace:");
+                throw exception.getThrowable();
+            }
+            fail("Got InvalidVersionStringException");
+        }
+    }
+}
diff --git a/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/SemanticVersioningSystemTest.java b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/SemanticVersioningSystemTest.java
new file mode 100644
index 0000000..e2d5766
--- /dev/null
+++ b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/SemanticVersioningSystemTest.java
@@ -0,0 +1,79 @@
+/*
+ * STAROPENSOURCE ENGINE SOURCE FILE
+ * Copyright (c) 2024 The StarOpenSource Engine Contributors
+ * Licensed under the GNU Affero General Public License v3
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.staropensource.sosengine.base.srctests.data.versioning;
+
+import de.staropensource.sosengine.base.data.versioning.SemanticVersioningSystem;
+import de.staropensource.sosengine.base.exceptions.InvalidVersionStringException;
+import de.staropensource.sosengine.unittests.UnitLogger;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.fail;
+
+/**
+ * Tests the class {@link SemanticVersioningSystem}.
+ */
+@SuppressWarnings({ "unused" })
+@DisplayName("SemanticVersioningSystem")
+public class SemanticVersioningSystemTest {
+    /**
+     * The unit logger for this instance.
+     */
+    private static final UnitLogger logger = new UnitLogger(SemanticVersioningSystemTest.class);
+    private static final Logger log = LoggerFactory.getLogger(SemanticVersioningSystemTest.class);
+
+    /**
+     * Tests the method {@code compare}.
+     */
+    @ParameterizedTest
+    @DisplayName("compare")
+    @CsvSource({
+            "1.1.0,         1.0.1,         0",
+            "1.1.0-beta,    1.1.0-alpha,   0",
+            "1.1.0-beta+2,  1.1.0-alpha+2, 0",
+            "1.1.0+4,       1.1.0+3,       0",
+            "1.1.0,         1.1.0,         1",
+            "1.1.0-rc,      1.1.0-rc,      1",
+            "1.1.0-rc+6,    1.1.0-rc+6,    1",
+            "1.1.0+4,       1.1.0+4,       1",
+            "1.1.0,         1.1.1,         2",
+            "1.1.0-alpha,   1.1.0-beta,    2",
+            "1.1.0-alpha+2, 1.1.0-alpha+3, 2",
+            "1.1.0+5,       1.1.0+6,       2",
+    })
+    void testCompare(String a, String b, int expected) throws Throwable {
+        logger.testCall("testCompare", a, b, expected);
+
+        try {
+            assertEquals(expected, new SemanticVersioningSystem(a).compare(new SemanticVersioningSystem(b)));
+        } catch (InvalidVersionStringException exception) {
+            logger.error("Got InvalidVersionStringException: " + exception.getMessage());
+            if (exception.getThrowable() != null) {
+                logger.error("Original stack trace:");
+                throw exception.getThrowable();
+            }
+            fail("Got InvalidVersionStringException");
+        }
+    }
+}
diff --git a/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/StarOpenSourceVersioningSystemTest.java b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/StarOpenSourceVersioningSystemTest.java
new file mode 100644
index 0000000..93d1940
--- /dev/null
+++ b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/StarOpenSourceVersioningSystemTest.java
@@ -0,0 +1,75 @@
+/*
+ * STAROPENSOURCE ENGINE SOURCE FILE
+ * Copyright (c) 2024 The StarOpenSource Engine Contributors
+ * Licensed under the GNU Affero General Public License v3
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.staropensource.sosengine.base.srctests.data.versioning;
+
+import de.staropensource.sosengine.base.data.versioning.SemanticVersioningSystem;
+import de.staropensource.sosengine.base.data.versioning.StarOpenSourceVersioningSystem;
+import de.staropensource.sosengine.base.exceptions.InvalidVersionStringException;
+import de.staropensource.sosengine.unittests.UnitLogger;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.fail;
+
+/**
+ * Tests the class {@link SemanticVersioningSystem}.
+ */
+@SuppressWarnings({ "unused" })
+@DisplayName("SemanticVersioningSystem")
+public class StarOpenSourceVersioningSystemTest {
+    /**
+     * The unit logger for this instance.
+     */
+    private static final UnitLogger logger = new UnitLogger(StarOpenSourceVersioningSystemTest.class);
+
+    /**
+     * Tests the method {@code compare}.
+     */
+    @ParameterizedTest
+    @DisplayName("compare")
+    @CsvSource({
+            "v1-releasecandidate7, v1-beta5,             0",
+            "v2-release5,          v2-release4,          0",
+            "v4-alpha0,            v3-alpha0,            0",
+            "v1-release5,          v1-release5,          1",
+            "v5-beta0-somefork,    v5-beta0,             1",
+            "v1-beta0+companion,   v1-beta0-fork,        1",
+            "v9-beta6-fork+comp,   v9-beta6-dork+homp,   1",
+            "v5-beta5,             v5-beta6,             2",
+            "v6-release0,          v7-release0,          2",
+            "v9-beta5,             v9-releasecandidate1, 2",
+    })
+    void testCompare(String a, String b, int expected) throws Throwable {
+        logger.testCall("testCompare", a, b, expected);
+
+        try {
+            assertEquals(expected, new StarOpenSourceVersioningSystem(a).compare(new StarOpenSourceVersioningSystem(b)));
+        } catch (InvalidVersionStringException exception) {
+            logger.error("Got InvalidVersionStringException: " + exception.getMessage());
+            if (exception.getThrowable() != null) {
+                logger.error("Original stack trace:");
+                throw exception.getThrowable();
+            }
+            fail("Got InvalidVersionStringException");
+        }
+    }
+}
diff --git a/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/ThreeNumberVersioningSystemTest.java b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/ThreeNumberVersioningSystemTest.java
new file mode 100644
index 0000000..cab8198
--- /dev/null
+++ b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/ThreeNumberVersioningSystemTest.java
@@ -0,0 +1,70 @@
+/*
+ * STAROPENSOURCE ENGINE SOURCE FILE
+ * Copyright (c) 2024 The StarOpenSource Engine Contributors
+ * Licensed under the GNU Affero General Public License v3
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.staropensource.sosengine.base.srctests.data.versioning;
+
+import de.staropensource.sosengine.base.data.versioning.ThreeNumberVersioningSystem;
+import de.staropensource.sosengine.base.exceptions.InvalidVersionStringException;
+import de.staropensource.sosengine.unittests.UnitLogger;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.fail;
+
+/**
+ * Tests the class {@link ThreeNumberVersioningSystem}.
+ */
+@SuppressWarnings({ "unused" })
+@DisplayName("SemanticVersioningSystem")
+public class ThreeNumberVersioningSystemTest {
+    /**
+     * The unit logger for this instance.
+     */
+    private static final UnitLogger logger = new UnitLogger(ThreeNumberVersioningSystemTest.class);
+    private static final Logger log = LoggerFactory.getLogger(ThreeNumberVersioningSystemTest.class);
+
+    /**
+     * Tests the method {@code compare}.
+     */
+    @ParameterizedTest
+    @DisplayName("compare")
+    @CsvSource({
+            "1.1.0, 1.0.1, 0",
+            "1.1.0, 1.1.0, 1",
+            "1.1.0, 1.1.1, 2",
+    })
+    void testCompare(String a, String b, int expected) throws Throwable {
+        logger.testCall("testCompare", a, b, expected);
+
+        try {
+            assertEquals(expected, new ThreeNumberVersioningSystem(a).compare(new ThreeNumberVersioningSystem(b)));
+        } catch (InvalidVersionStringException exception) {
+            logger.error("Got InvalidVersionStringException: " + exception.getMessage());
+            if (exception.getThrowable() != null) {
+                logger.error("Original stack trace:");
+                throw exception.getThrowable();
+            }
+            fail("Got InvalidVersionStringException");
+        }
+    }
+}
diff --git a/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/TwoNumberVersioningSystemTest.java b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/TwoNumberVersioningSystemTest.java
new file mode 100644
index 0000000..e1394e1
--- /dev/null
+++ b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/TwoNumberVersioningSystemTest.java
@@ -0,0 +1,70 @@
+/*
+ * STAROPENSOURCE ENGINE SOURCE FILE
+ * Copyright (c) 2024 The StarOpenSource Engine Contributors
+ * Licensed under the GNU Affero General Public License v3
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.staropensource.sosengine.base.srctests.data.versioning;
+
+import de.staropensource.sosengine.base.data.versioning.TwoNumberVersioningSystem;
+import de.staropensource.sosengine.base.exceptions.InvalidVersionStringException;
+import de.staropensource.sosengine.unittests.UnitLogger;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.fail;
+
+/**
+ * Tests the class {@link TwoNumberVersioningSystem}.
+ */
+@SuppressWarnings({ "unused" })
+@DisplayName("SemanticVersioningSystem")
+public class TwoNumberVersioningSystemTest {
+    /**
+     * The unit logger for this instance.
+     */
+    private static final UnitLogger logger = new UnitLogger(TwoNumberVersioningSystemTest.class);
+    private static final Logger log = LoggerFactory.getLogger(TwoNumberVersioningSystemTest.class);
+
+    /**
+     * Tests the method {@code compare}.
+     */
+    @ParameterizedTest
+    @DisplayName("compare")
+    @CsvSource({
+            "1.5, 1.0, 0",
+            "1.5, 1.5, 1",
+            "1.5, 2.0, 2",
+    })
+    void testCompare(String a, String b, int expected) throws Throwable {
+        logger.testCall("testCompare", a, b, expected);
+
+        try {
+            assertEquals(expected, new TwoNumberVersioningSystem(a).compare(new TwoNumberVersioningSystem(b)));
+        } catch (InvalidVersionStringException exception) {
+            logger.error("Got InvalidVersionStringException: " + exception.getMessage());
+            if (exception.getThrowable() != null) {
+                logger.error("Original stack trace:");
+                throw exception.getThrowable();
+            }
+            fail("Got InvalidVersionStringException");
+        }
+    }
+}