1 files changed, 59 insertions, 0 deletions
diff --git a/src/SMAPI/ISemanticVersion.cs b/src/SMAPI/ISemanticVersion.cs
new file mode 100644
index 00000000..0483c97b
--- /dev/null
+++ b/src/SMAPI/ISemanticVersion.cs
@@ -0,0 +1,59 @@
+using System;
+
+namespace StardewModdingAPI
+{
+    /// <summary>A semantic version with an optional release tag.</summary>
+    public interface ISemanticVersion : IComparable<ISemanticVersion>, IEquatable<ISemanticVersion>
+    {
+        /*********
+        ** Accessors
+        *********/
+        /// <summary>The major version incremented for major API changes.</summary>
+        int MajorVersion { get; }
+
+        /// <summary>The minor version incremented for backwards-compatible changes.</summary>
+        int MinorVersion { get; }
+
+        /// <summary>The patch version for backwards-compatible bug fixes.</summary>
+        int PatchVersion { get; }
+
+        /// <summary>An optional build tag.</summary>
+        string Build { get; }
+
+
+        /*********
+        ** Accessors
+        *********/
+        /// <summary>Get whether this version is older than the specified version.</summary>
+        /// <param name="other">The version to compare with this instance.</param>
+        bool IsOlderThan(ISemanticVersion other);
+
+        /// <summary>Get whether this version is older than the specified version.</summary>
+        /// <param name="other">The version to compare with this instance.</param>
+        /// <exception cref="FormatException">The specified version is not a valid semantic version.</exception>
+        bool IsOlderThan(string other);
+
+        /// <summary>Get whether this version is newer than the specified version.</summary>
+        /// <param name="other">The version to compare with this instance.</param>
+        bool IsNewerThan(ISemanticVersion other);
+
+        /// <summary>Get whether this version is newer than the specified version.</summary>
+        /// <param name="other">The version to compare with this instance.</param>
+        /// <exception cref="FormatException">The specified version is not a valid semantic version.</exception>
+        bool IsNewerThan(string other);
+
+        /// <summary>Get whether this version is between two specified versions (inclusively).</summary>
+        /// <param name="min">The minimum version.</param>
+        /// <param name="max">The maximum version.</param>
+        bool IsBetween(ISemanticVersion min, ISemanticVersion max);
+
+        /// <summary>Get whether this version is between two specified versions (inclusively).</summary>
+        /// <param name="min">The minimum version.</param>
+        /// <param name="max">The maximum version.</param>
+        /// <exception cref="FormatException">One of the specified versions is not a valid semantic version.</exception>
+        bool IsBetween(string min, string max);
+
+        /// <summary>Get a string representation of the version.</summary>
+        string ToString();
+    }
+}