An idiomatic C++ client library for the Document AI Warehouse API, an integrated, cloud-based platform to store, search, organize, govern and analyze documents and their structured metadata.
While this library is GA, please note that the Google Cloud C++ client libraries do not follow Semantic Versioning.
Quickstart
The following shows the code that you'll run in the google/cloud/contentwarehouse/quickstart/ directory, which should give you a taste of the Document AI Warehouse API C++ client library API.
This library offers multiple *Client classes, which are listed below. Each one of these classes exposes all the RPCs for a service as member functions of the class. This library groups multiple services because they are part of the same product or are often used together. A typical example may be the administrative and data plane operations for a single product.
The library also has other classes that provide helpers, configuration parameters, and infrastructure to mock the *Client classes when testing your application.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThis webpage details the C++ client library for the Document AI Warehouse API, a platform for managing and analyzing documents and their metadata.\u003c/p\u003e\n"],["\u003cp\u003eThe latest version of the client library is 2.37.0-rc, and there are many previous versions available, with the currently detailed version being 2.18.0.\u003c/p\u003e\n"],["\u003cp\u003eThe library provides multiple \u003ccode\u003e*Client\u003c/code\u003e classes, including \u003ccode\u003eDocumentServiceClient\u003c/code\u003e, \u003ccode\u003eDocumentLinkServiceClient\u003c/code\u003e, \u003ccode\u003eDocumentSchemaServiceClient\u003c/code\u003e, \u003ccode\u003eRuleSetServiceClient\u003c/code\u003e, and \u003ccode\u003eSynonymSetServiceClient\u003c/code\u003e, for accessing different API services.\u003c/p\u003e\n"],["\u003cp\u003eWhile the library is generally available (GA), it's crucial to note that the Google Cloud C++ client libraries do not adhere to Semantic Versioning.\u003c/p\u003e\n"],["\u003cp\u003eThere are resources available within the library to show how it handles error, how you can override endpoints and authentication credentials, and how you can override retry policies, backoff, and idempotency policies.\u003c/p\u003e\n"]]],[],null,["Version 2.18.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/contentwarehouse/latest)\n- [2.41.0](/cpp/docs/reference/contentwarehouse/2.41.0)\n- [2.40.0](/cpp/docs/reference/contentwarehouse/2.40.0)\n- [2.39.0](/cpp/docs/reference/contentwarehouse/2.39.0)\n- [2.38.0](/cpp/docs/reference/contentwarehouse/2.38.0)\n- [2.37.0](/cpp/docs/reference/contentwarehouse/2.37.0)\n- [2.36.0](/cpp/docs/reference/contentwarehouse/2.36.0)\n- [2.35.0](/cpp/docs/reference/contentwarehouse/2.35.0)\n- [2.34.0](/cpp/docs/reference/contentwarehouse/2.34.0)\n- [2.33.0](/cpp/docs/reference/contentwarehouse/2.33.0)\n- [2.32.0](/cpp/docs/reference/contentwarehouse/2.32.0)\n- [2.31.0](/cpp/docs/reference/contentwarehouse/2.31.0)\n- [2.30.0](/cpp/docs/reference/contentwarehouse/2.30.0)\n- [2.29.0](/cpp/docs/reference/contentwarehouse/2.29.0)\n- [2.28.0](/cpp/docs/reference/contentwarehouse/2.28.0)\n- [2.27.0](/cpp/docs/reference/contentwarehouse/2.27.0)\n- [2.26.0](/cpp/docs/reference/contentwarehouse/2.26.0)\n- [2.25.1](/cpp/docs/reference/contentwarehouse/2.25.1)\n- [2.24.0](/cpp/docs/reference/contentwarehouse/2.24.0)\n- [2.23.0](/cpp/docs/reference/contentwarehouse/2.23.0)\n- [2.22.1](/cpp/docs/reference/contentwarehouse/2.22.1)\n- [2.21.0](/cpp/docs/reference/contentwarehouse/2.21.0)\n- [2.20.0](/cpp/docs/reference/contentwarehouse/2.20.0)\n- [2.19.0](/cpp/docs/reference/contentwarehouse/2.19.0)\n- [2.18.0](/cpp/docs/reference/contentwarehouse/2.18.0)\n- [2.17.0](/cpp/docs/reference/contentwarehouse/2.17.0)\n- [2.16.0](/cpp/docs/reference/contentwarehouse/2.16.0)\n- [2.15.1](/cpp/docs/reference/contentwarehouse/2.15.1)\n- [2.14.0](/cpp/docs/reference/contentwarehouse/2.14.0)\n- [2.13.0](/cpp/docs/reference/contentwarehouse/2.13.0)\n- [2.12.0](/cpp/docs/reference/contentwarehouse/2.12.0) \n\nDocument AI Warehouse API C++ Client Library\n============================================\n\nAn idiomatic C++ client library for the [Document AI Warehouse API](https://cloud.google.com/document-warehouse/), an integrated, cloud-based platform to store, search, organize, govern and analyze documents and their structured metadata.\n\nWhile this library is **GA** , please note that the Google Cloud C++ client libraries do **not** follow [Semantic Versioning](https://semver.org/).\n\n### Quickstart\n\nThe following shows the code that you'll run in the `google/cloud/contentwarehouse/quickstart/` directory, which should give you a taste of the Document AI Warehouse API C++ client library API. \n\n #include \"google/cloud/contentwarehouse/v1/document_client.h\"\n #include \"google/cloud/location.h\"\n #include \u003ciostream\u003e\n\n int main(int argc, char* argv[]) try {\n if (argc != 3) {\n std::cerr \u003c\u003c \"Usage: \" \u003c\u003c argv[0] \u003c\u003c \" project-number location-id\\n\";\n return 1;\n }\n\n auto const location = google::cloud::Location(argv[1], argv[2]);\n\n namespace contentwarehouse = ::google::cloud::contentwarehouse_v1;\n auto client = contentwarehouse::DocumentServiceClient(\n contentwarehouse::MakeDocumentServiceConnection());\n\n for (auto md : client.SearchDocuments(location.FullName())) {\n if (!md) throw std::move(md).status();\n std::cout \u003c\u003c md-\u003eDebugString() \u003c\u003c \"\\n\";\n }\n\n return 0;\n } catch (google::cloud::Status const& status) {\n std::cerr \u003c\u003c \"google::cloud::Status thrown: \" \u003c\u003c status \u003c\u003c \"\\n\";\n return 1;\n }\n\n### Main classes\n\nThis library offers multiple `*Client` classes, which are listed below. Each one of these classes exposes all the RPCs for a service as member functions of the class. This library groups multiple services because they are part of the same product or are often used together. A typical example may be the administrative and data plane operations for a single product.\n\nThe library also has other classes that provide helpers, configuration parameters, and infrastructure to mock the `*Client` classes when testing your application.\n\n- [`contentwarehouse_v1::DocumentServiceClient`](/cpp/docs/reference/contentwarehouse/2.18.0/classgoogle_1_1cloud_1_1contentwarehouse__v1_1_1DocumentServiceClient)\n- [`contentwarehouse_v1::DocumentLinkServiceClient`](/cpp/docs/reference/contentwarehouse/2.18.0/classgoogle_1_1cloud_1_1contentwarehouse__v1_1_1DocumentLinkServiceClient)\n- [`contentwarehouse_v1::DocumentSchemaServiceClient`](/cpp/docs/reference/contentwarehouse/2.18.0/classgoogle_1_1cloud_1_1contentwarehouse__v1_1_1DocumentSchemaServiceClient)\n- [`contentwarehouse_v1::RuleSetServiceClient`](/cpp/docs/reference/contentwarehouse/2.18.0/classgoogle_1_1cloud_1_1contentwarehouse__v1_1_1RuleSetServiceClient)\n- [`contentwarehouse_v1::SynonymSetServiceClient`](/cpp/docs/reference/contentwarehouse/2.18.0/classgoogle_1_1cloud_1_1contentwarehouse__v1_1_1SynonymSetServiceClient)\n\n### More Information\n\n- [Error Handling](https://cloud.google.com/cpp/docs/reference/common/latest/common-error-handling.html) - describes how the library reports errors.\n- [How to Override the Default Endpoint](/cpp/docs/reference/contentwarehouse/2.18.0/contentwarehouse-override-endpoint) - describes how to override the default endpoint.\n- [How to Override the Authentication Credentials](/cpp/docs/reference/contentwarehouse/2.18.0/contentwarehouse-override-authentication) - describes how to change the authentication credentials used by the library.\n- [Override Retry, Backoff, and Idempotency Policies](/cpp/docs/reference/contentwarehouse/2.18.0/contentwarehouse-override-retry) - describes how to change the default retry policies.\n- [Environment Variables](/cpp/docs/reference/contentwarehouse/2.18.0/contentwarehouse-env) - describes environment variables that can configure the behavior of the library."]]