diff --git a/docfx/docs/build-systems/msbuild.md b/docfx/docs/build-systems/msbuild.md
index e6ea9bc5..2b2ba4ab 100644
--- a/docfx/docs/build-systems/msbuild.md
+++ b/docfx/docs/build-systems/msbuild.md
@@ -51,6 +51,15 @@ Property | Default | Description
 `NBGV_ThisAssemblyIncludesPackageVersion` | `false` | When `true`, a `NuGetPackageVersion` property is added to the `ThisAssembly` class.
 `NBGV_UseAssemblyVersionInNativeVersion` | `true` | When `false`, uses the `AssemblyFileVersion` as a native `PRODUCTVERSION`.
 
+### Items
+
+The following MSBuild items may be declared in your project to customize the computed version:
+
+Item type | Description
+--|--
+`BuildMetadata` | Adds `+ItemName` build metadata for each item to the computed version.
+`PrereleaseIdentifier` | Adds `-ItemName` build metadata for each item to the computed version.
+
 ### Custom `ThisAssembly` static fields and constants
 
 Custom constants may be added to the `ThisAssembly` class through `AdditionalThisAssemblyFields` items defined in your project.
diff --git a/src/NerdBank.GitVersioning/VersionOracle.cs b/src/NerdBank.GitVersioning/VersionOracle.cs
index 89157ee3..64bdfe08 100644
--- a/src/NerdBank.GitVersioning/VersionOracle.cs
+++ b/src/NerdBank.GitVersioning/VersionOracle.cs
@@ -208,7 +208,31 @@ public IEnumerable<string> BuildMetadataWithCommitId
     /// <summary>
     /// Gets the prerelease version information, including a leading hyphen.
     /// </summary>
-    public string PrereleaseVersion => this.ReplaceMacros(this.VersionOptions?.Version?.Prerelease ?? string.Empty);
+    /// <value>An empty string for a stable release, or a string like <c>-beta</c>.</value>
+    public string PrereleaseVersion
+    {
+        get
+        {
+            string result = this.ReplaceMacros(this.VersionOptions?.Version?.Prerelease ?? string.Empty);
+
+            foreach (string identifier in this.ExtraPrereleaseIdentifiers)
+            {
+                if (result.Length == 0)
+                {
+                    result = "-";
+                }
+                else
+                {
+                    // In semver v2, identifiers should be separated by periods.
+                    result += this.VersionOptions?.NuGetPackageVersionOrDefault.SemVerOrDefault >= 2 ? '.' : '-';
+                }
+
+                result += identifier;
+            }
+
+            return result;
+        }
+    }
 
     /// <summary>
     /// Gets the prerelease version information, omitting the leading hyphen, if any.
@@ -379,6 +403,12 @@ public IDictionary<string, string> CloudBuildVersionVars
     [Ignore]
     public List<string> BuildMetadata { get; } = new List<string>();
 
+    /// <summary>
+    /// Gets a list of prerelease identifiers to add to whatever the default prerelease identifiers are.
+    /// </summary>
+    [Ignore]
+    public List<string> ExtraPrereleaseIdentifiers { get; } = new List<string>();
+
     /// <summary>
     /// Gets the +buildMetadata fragment for the semantic version.
     /// </summary>
diff --git a/src/Nerdbank.GitVersioning.Tasks/GetBuildVersion.cs b/src/Nerdbank.GitVersioning.Tasks/GetBuildVersion.cs
index 683ff6d0..703591fa 100644
--- a/src/Nerdbank.GitVersioning.Tasks/GetBuildVersion.cs
+++ b/src/Nerdbank.GitVersioning.Tasks/GetBuildVersion.cs
@@ -1,12 +1,7 @@
 // Copyright (c) .NET Foundation and Contributors. All rights reserved.
 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
 
-using System;
-using System.Collections.Generic;
 using System.Globalization;
-using System.IO;
-using System.Linq;
-using System.Reflection;
 using Microsoft.Build.Framework;
 using Microsoft.Build.Utilities;
 using MSBuildExtensionTask;
@@ -28,6 +23,11 @@ public GetBuildVersion()
         /// </summary>
         public string BuildMetadata { get; set; }
 
+        /// <summary>
+        /// Gets or sets an array of prerelease identifiers to append to whatever else may be determined by default.
+        /// </summary>
+        public string PrereleaseIdentifiers { get; set; }
+
         /// <summary>
         /// Gets or sets the value of the PublicRelease property in MSBuild at the
         /// start of this Task.
@@ -256,6 +256,11 @@ protected override bool ExecuteInner()
                     oracle.BuildMetadata.AddRange(this.BuildMetadata.Split(';'));
                 }
 
+                if (this.PrereleaseIdentifiers is { Length: > 0 })
+                {
+                    oracle.ExtraPrereleaseIdentifiers.AddRange(this.PrereleaseIdentifiers.Split(';'));
+                }
+
                 if (IsMisconfiguredPrereleaseAndSemVer1(oracle))
                 {
                     this.Log.LogWarning("The 'nugetPackageVersion' is explicitly set to 'semVer': 1 but the prerelease version '{0}' is not SemVer1 compliant. Change the 'nugetPackageVersion'.'semVer' value to 2 or change the 'version' member to follow SemVer1 rules (e.g.: '{1}').", oracle.PrereleaseVersion, GetSemVer1WithoutPaddingOrBuildMetadata(oracle));
diff --git a/src/Nerdbank.GitVersioning.Tasks/build/InProjectVersionComputation.targets b/src/Nerdbank.GitVersioning.Tasks/build/InProjectVersionComputation.targets
index 349fff64..b095c014 100644
--- a/src/Nerdbank.GitVersioning.Tasks/build/InProjectVersionComputation.targets
+++ b/src/Nerdbank.GitVersioning.Tasks/build/InProjectVersionComputation.targets
@@ -6,6 +6,7 @@
          CallTarget invoked targets do not see properties set by the calling target. -->
     <PropertyGroup>
       <BuildMetadata>@(BuildMetadata, ',')</BuildMetadata>
+      <PrereleaseIdentifiers>@(PrereleaseIdentifier, ',')</PrereleaseIdentifiers>
     </PropertyGroup>
   </Target>
 
diff --git a/src/Nerdbank.GitVersioning.Tasks/build/MSBuildTargetCaching.targets b/src/Nerdbank.GitVersioning.Tasks/build/MSBuildTargetCaching.targets
index 2a9a7daa..e767c328 100644
--- a/src/Nerdbank.GitVersioning.Tasks/build/MSBuildTargetCaching.targets
+++ b/src/Nerdbank.GitVersioning.Tasks/build/MSBuildTargetCaching.targets
@@ -16,12 +16,13 @@
     <NBGV_GlobalPropertiesToRemove Include="RuntimeIdentifier" />
 
     <_BuildMetadataSnapped Include="@(BuildMetadata)" />
+    <_PrereleaseIdentifierSnapped Include="@(PrereleaseIdentifier)" />
   </ItemGroup>
 
   <ItemGroup>
     <NBGV_CachingProjectReference Include="$(NBGV_CachingProjectReference)">
       <Targets>GetBuildVersion_Properties;GetBuildVersion_CloudBuildVersionVars</Targets>
-      <Properties>$(NBGV_InnerGlobalProperties)BuildMetadata=@(BuildMetadata, ',');</Properties>
+      <Properties>$(NBGV_InnerGlobalProperties)BuildMetadata=@(BuildMetadata, ',');PrereleaseIdentifiers=@(PrereleaseIdentifier, ',')</Properties>
       <SetConfiguration>Configuration=Release</SetConfiguration>
       <SetPlatform>Platform=AnyCPU</SetPlatform>
       <GlobalPropertiesToRemove>@(NBGV_GlobalPropertiesToRemove)</GlobalPropertiesToRemove>
@@ -44,6 +45,7 @@
 
   <Target Name="InvokeGetBuildVersionTask">
     <Error Text="BuildMetadata items changed after a copy was made. Add all BuildMetadata items before importing this file." Condition=" '@(BuildMetadata)' != '@(_BuildMetadataSnapped)' " />
+    <Error Text="PrereleaseIdentifier items changed after a copy was made. Add all PrereleaseIdentifier items before importing this file." Condition=" '@(PrereleaseIdentifier)' != '@(_PrereleaseIdentifierSnapped)' " />
 
     <!-- Calculate version by invoking another "project" with global properties that will serve as a key
          into an msbuild cache to ensure we only invoke the GetBuildVersion task as many times as will produce a unique value. -->
diff --git a/src/Nerdbank.GitVersioning.Tasks/build/Nerdbank.GitVersioning.Inner.targets b/src/Nerdbank.GitVersioning.Tasks/build/Nerdbank.GitVersioning.Inner.targets
index ac037a13..20c36728 100644
--- a/src/Nerdbank.GitVersioning.Tasks/build/Nerdbank.GitVersioning.Inner.targets
+++ b/src/Nerdbank.GitVersioning.Tasks/build/Nerdbank.GitVersioning.Inner.targets
@@ -17,6 +17,7 @@
     <Nerdbank.GitVersioning.Tasks.GetBuildVersion
       BuildingRef="$(_NBGV_BuildingRef)"
       BuildMetadata="$(BuildMetadata.Replace(',',';'))"
+      PrereleaseIdentifiers="$(PrereleaseIdentifiers.Replace(',',';'))"
       DefaultPublicRelease="$(PublicRelease)"
       ProjectDirectory="$(GitVersionBaseDirectory)"
       GitRepoRoot="$(GitRepoRoot)"
diff --git a/test/Nerdbank.GitVersioning.Tests/BuildIntegrationTests.cs b/test/Nerdbank.GitVersioning.Tests/BuildIntegrationTests.cs
index 8badf5d5..a8fef20a 100644
--- a/test/Nerdbank.GitVersioning.Tests/BuildIntegrationTests.cs
+++ b/test/Nerdbank.GitVersioning.Tests/BuildIntegrationTests.cs
@@ -155,6 +155,21 @@ public async Task GetBuildVersion_Without_Git_HighPrecisionAssemblyVersion()
         Assert.Equal("3.4.0", buildResult.AssemblyInformationalVersion);
     }
 
+    [Fact]
+    public async Task WithExtraPrereleaseIdentifiers()
+    {
+        this.WriteVersionFile(new VersionOptions
+        {
+            Version = SemanticVersion.Parse("3.4"),
+        });
+        this.InitializeSourceControl();
+        this.testProject.AddItem("PrereleaseIdentifier", "i1");
+        this.testProject.AddItem("PrereleaseIdentifier", "i2");
+        this.globalProperties["PublicRelease"] = "true";
+        BuildResults buildResult = await this.BuildAsync();
+        Assert.Matches(@"^3\.4\.[01]-i1-i2$", buildResult.NuGetPackageVersion);
+    }
+
     // TODO: add key container test.
     [Theory]
     [InlineData("keypair.snk", false)]
diff --git a/test/Nerdbank.GitVersioning.Tests/VersionOracleTests.cs b/test/Nerdbank.GitVersioning.Tests/VersionOracleTests.cs
index abdbe3b2..6de673fd 100644
--- a/test/Nerdbank.GitVersioning.Tests/VersionOracleTests.cs
+++ b/test/Nerdbank.GitVersioning.Tests/VersionOracleTests.cs
@@ -291,6 +291,111 @@ public void SemVerStableNonPublicVersionShortened()
         Assert.Matches(@"^2.3.1-g[a-f0-9]{7}$", oracle.ChocolateyPackageVersion);
     }
 
+    [Fact]
+    public void ExtraPrereleaseIdentifiers_StableBase_V1()
+    {
+        var workingCopyVersion = new VersionOptions
+        {
+            Version = SemanticVersion.Parse("2.3"),
+            NuGetPackageVersion = new VersionOptions.NuGetPackageVersionOptions
+            {
+                SemVer = 1,
+            },
+        };
+        this.WriteVersionFile(workingCopyVersion);
+        this.InitializeSourceControl();
+        VersionOracle oracle = new(this.Context)
+        {
+            ExtraPrereleaseIdentifiers = { "i1", "i2" },
+            PublicRelease = true,
+        };
+        Assert.Equal(@"2.3.1-i1-i2", oracle.NuGetPackageVersion);
+    }
+
+    [Fact]
+    public void ExtraPrereleaseIdentifiers_StableBase_V2()
+    {
+        var workingCopyVersion = new VersionOptions
+        {
+            Version = SemanticVersion.Parse("2.3"),
+            NuGetPackageVersion = new VersionOptions.NuGetPackageVersionOptions
+            {
+                SemVer = 2,
+            },
+        };
+        this.WriteVersionFile(workingCopyVersion);
+        this.InitializeSourceControl();
+        VersionOracle oracle = new(this.Context)
+        {
+            ExtraPrereleaseIdentifiers = { "i1", "i2" },
+            PublicRelease = true,
+        };
+        Assert.Equal(@"2.3.1-i1.i2", oracle.NuGetPackageVersion);
+    }
+
+    [Fact]
+    public void ExtraPrereleaseIdentifiers_StableBase_V2_NonPublic()
+    {
+        var workingCopyVersion = new VersionOptions
+        {
+            Version = SemanticVersion.Parse("2.3"),
+            NuGetPackageVersion = new VersionOptions.NuGetPackageVersionOptions
+            {
+                SemVer = 2,
+            },
+        };
+        this.WriteVersionFile(workingCopyVersion);
+        this.InitializeSourceControl();
+        VersionOracle oracle = new(this.Context)
+        {
+            ExtraPrereleaseIdentifiers = { "i1", "i2" },
+            PublicRelease = false,
+        };
+        Assert.Matches(@"^2\.3\.1-i1\.i2\.g", oracle.NuGetPackageVersion);
+    }
+
+    [Fact]
+    public void ExtraPrereleaseIdentifiers_UnstableBase_V1()
+    {
+        var workingCopyVersion = new VersionOptions
+        {
+            Version = SemanticVersion.Parse("2.3-abc"),
+            NuGetPackageVersion = new VersionOptions.NuGetPackageVersionOptions
+            {
+                SemVer = 1,
+            },
+        };
+        this.WriteVersionFile(workingCopyVersion);
+        this.InitializeSourceControl();
+        VersionOracle oracle = new(this.Context)
+        {
+            ExtraPrereleaseIdentifiers = { "i1", "i2" },
+            PublicRelease = true,
+        };
+        Assert.Equal(@"2.3.1-abc-i1-i2", oracle.NuGetPackageVersion);
+    }
+
+    [Fact]
+    public void ExtraPrereleaseIdentifiers_UnstableBase_V2()
+    {
+        var workingCopyVersion = new VersionOptions
+        {
+            Version = SemanticVersion.Parse("2.3-abc"),
+            NuGetPackageVersion = new VersionOptions.NuGetPackageVersionOptions
+            {
+                SemVer = 2,
+            },
+        };
+        this.WriteVersionFile(workingCopyVersion);
+        this.InitializeSourceControl();
+        VersionOracle oracle = new(this.Context)
+        {
+            ExtraPrereleaseIdentifiers = { "i1", "i2" },
+            PublicRelease = true,
+        };
+        Assert.Equal(@"2.3.1-abc.i1.i2", oracle.NuGetPackageVersion);
+    }
+
     [Theory]
     [InlineData("1.2.0.0", null, null)]
     [InlineData("1.0.0.0", null, VersionOptions.VersionPrecision.Major)]