public sealed class AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec : IMessage<AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec>, IEquatable<AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec>, IDeepCloneable<AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec>, IBufferMessage, IMessage
Reference documentation and code samples for the Discovery Engine v1 API class AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07 UTC."],[],[],null,["# Discovery Engine v1 API - Class AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec (1.9.0)\n\nVersion latestkeyboard_arrow_down\n\n- [1.9.0 (latest)](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec)\n- [1.8.0](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/1.8.0/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec)\n- [1.7.0](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/1.7.0/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec)\n- [1.6.0](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/1.6.0/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec)\n- [1.5.0](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/1.5.0/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec)\n- [1.4.0](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/1.4.0/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec)\n- [1.3.0](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/1.3.0/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec)\n- [1.2.0](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/1.2.0/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec)\n- [1.1.0](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/1.1.0/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec)\n- [1.0.0-beta06](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/1.0.0-beta06/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec) \n\n public sealed class AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec : IMessage\u003cAnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec\u003e, IEquatable\u003cAnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec\u003e, IDeepCloneable\u003cAnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec\u003e, IBufferMessage, IMessage\n\nReference documentation and code samples for the Discovery Engine v1 API class AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec.\n\nQuery Rephraser Model specification. \n\nInheritance\n-----------\n\n[object](https://learn.microsoft.com/dotnet/api/system.object) \\\u003e AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec \n\nImplements\n----------\n\n[IMessage](https://cloud.google.com/dotnet/docs/reference/Google.Protobuf/latest/Google.Protobuf.IMessage-1.html)[AnswerQueryRequest](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest)[Types](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types)[QueryUnderstandingSpec](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec)[Types](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types)[QueryRephraserSpec](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec)[Types](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types)[ModelSpec](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec), [IEquatable](https://learn.microsoft.com/dotnet/api/system.iequatable-1)[AnswerQueryRequest](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest)[Types](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types)[QueryUnderstandingSpec](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec)[Types](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types)[QueryRephraserSpec](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec)[Types](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types)[ModelSpec](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec), [IDeepCloneable](https://cloud.google.com/dotnet/docs/reference/Google.Protobuf/latest/Google.Protobuf.IDeepCloneable-1.html)[AnswerQueryRequest](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest)[Types](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types)[QueryUnderstandingSpec](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec)[Types](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types)[QueryRephraserSpec](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec)[Types](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types)[ModelSpec](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1.AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec), [IBufferMessage](https://cloud.google.com/dotnet/docs/reference/Google.Protobuf/latest/Google.Protobuf.IBufferMessage.html), [IMessage](https://cloud.google.com/dotnet/docs/reference/Google.Protobuf/latest/Google.Protobuf.IMessage.html) \n\nInherited Members\n-----------------\n\n[object.GetHashCode()](https://learn.microsoft.com/dotnet/api/system.object.gethashcode) \n[object.GetType()](https://learn.microsoft.com/dotnet/api/system.object.gettype) \n[object.ToString()](https://learn.microsoft.com/dotnet/api/system.object.tostring)\n\nNamespace\n---------\n\n[Google.Cloud.DiscoveryEngine.V1](/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1/latest/Google.Cloud.DiscoveryEngine.V1)\n\nAssembly\n--------\n\nGoogle.Cloud.DiscoveryEngine.V1.dll\n\nConstructors\n------------\n\n### ModelSpec()\n\n public ModelSpec()\n\n### ModelSpec(ModelSpec)\n\n public ModelSpec(AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec other)\n\nProperties\n----------\n\n### ModelType\n\n public AnswerQueryRequest.Types.QueryUnderstandingSpec.Types.QueryRephraserSpec.Types.ModelSpec.Types.ModelType ModelType { get; set; }\n\nOptional. Enabled query rephraser model type. If not set, it will use\nLARGE by default."]]