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‎articles/search/search-api-preview.md

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# Preview features in Azure AI Search
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|Feature                         | Category | Description | Availability |
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|---------|------------------|-------------|---------------|
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| [**Lower the dimension requirements for MRL-trained text embedding models on Azure OpenAI**](vector-search-how-to-truncate-dimensions.md) | Feature | Text-embedding-3-small and Text-embedding-3-large are trained using Matryoshka Representation Learning (MRL). This allows you to truncate the embedding vectors to fewer dimensions, and adjust the balance between vector index size usage and retrieval quality. A new `truncationDimension` provides the MRL behaviors as an additional parameter in a vector compression configuration. This can only be configured for new vector fields. | [Create or Update Index (preview)](/rest/api/searchservice/indexes/create-or-update?view=rest-searchservice-2024-09-01-preview&preserve-view=true). |
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| [**Unpack `@search.score` to view subscores in hybrid search results**](hybrid-search-ranking.md#unpack-a-search-score-into-subscores-preview) | Feature | You can investigate Reciprocal Rank Fusion (RRF) ranked results by viewing the individual query subscores of the final merged and scored result. A new `debug` property unpacks the search score. `QueryResultDocumentSubscores`, `QueryResultDocumentRerankerInput`, and `QueryResultDocumentSemanticField` provide the extra detail. | [Search Documents (preview)](/rest/api/searchservice/documents/search-post?view=rest-searchservice-2024-09-01-preview&preserve-view=true). |
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| [**Target filters in a hybrid search to just the vector queries**](hybrid-search-how-to-query.md#hybrid-search-with-filters-targeting-vector-subqueries-preview) | Feature | A filter on a hybrid query involves all subqueries on the request, regardless of type. You can override the global filter to scope the filter to a specific subquery. A new `filterOverride` parameter provides the behaviors. | [Search Documents (preview)](/rest/api/searchservice/documents/search-post?view=rest-searchservice-2024-09-01-preview&preserve-view=true). |
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| [**Query rewrite in the semantic reranker**](semantic-how-to-query-rewrite.md) | Relevance (scoring) | You can set options on a semantic query to rewrite the query input into a revised or expanded query that generates more relevant results from the L2 ranker. | [Search Documents (preview)](/rest/api/searchservice/documents/search-post?view=rest-searchservice-2024-11-01-preview&preserve-view=true).|
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| [**Document Layout skill**](cognitive-search-document-layout.md) | Applied AI (skills) | A new skill used to analyze a document for structure. | [Create or Update Skillset (preview)](/rest/api/searchservice/skillsets/create-or-update?view=rest-searchservice-2024-11-01-preview&preserve-view=true). |
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| [**Managed identity for keyless billing to an Azure AI multiservice subdomain**](cognitive-search-attach-cognitive-services.md). | Applied AI (skills) | You can now use a managed identity and roles for a keyless connection to Azure AI services for built-in skills processing. This capability removes restrictions for having both search and AI services in the same region. | [Create or Update Skillset (preview)](/rest/api/searchservice/skillsets/create-or-update?view=rest-searchservice-2024-11-01-preview&preserve-view=true).|
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| [**Markdown parsing mode**](search-how-to-index-markdown-blobs.md) | Indexer data source | With this parsing mode, indexers can generate one-to-one or one-to-many search documents from Markdown files in Azure Storage. | [Create or Update Indexer (preview)](/rest/api/searchservice/indexers/create-or-update?view=rest-searchservice-2024-11-01-preview&preserve-view=true). |
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| [**Rescoring options for compressed vectors**](vector-search-how-to-quantization.md) | Relevance (scoring) | You can set options to rescore with original vectors instead of compressed vectors. Applies to HNSW and exhaustive KNN vector algorithms, using binary and scalar compression. | [Create or Update Index (preview)](/rest/api/searchservice/indexes/create-or-update?view=rest-searchservice-2024-09-01-preview&preserve-view=true).|
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| [**Lower the dimension requirements for MRL-trained text embedding models on Azure OpenAI**](vector-search-how-to-truncate-dimensions.md) | Index | Text-embedding-3-small and Text-embedding-3-large are trained using Matryoshka Representation Learning (MRL). This allows you to truncate the embedding vectors to fewer dimensions, and adjust the balance between vector index size usage and retrieval quality. A new `truncationDimension` provides the MRL behaviors as an extra parameter in a vector compression configuration. This can only be configured for new vector fields. | [Create or Update Index (preview)](/rest/api/searchservice/indexes/create-or-update?view=rest-searchservice-2024-09-01-preview&preserve-view=true). |
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| [**Unpack `@search.score` to view subscores in hybrid search results**](hybrid-search-ranking.md#unpack-a-search-score-into-subscores-preview) | Relevance (scoring) | You can investigate Reciprocal Rank Fusion (RRF) ranked results by viewing the individual query subscores of the final merged and scored result. A new `debug` property unpacks the search score. `QueryResultDocumentSubscores`, `QueryResultDocumentRerankerInput`, and `QueryResultDocumentSemanticField` provide the extra detail. | [Search Documents (preview)](/rest/api/searchservice/documents/search-post?view=rest-searchservice-2024-09-01-preview&preserve-view=true). |
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| [**Target filters in a hybrid search to just the vector queries**](hybrid-search-how-to-query.md#hybrid-search-with-filters-targeting-vector-subqueries-preview) | Query | A filter on a hybrid query involves all subqueries on the request, regardless of type. You can override the global filter to scope the filter to a specific subquery. A new `filterOverride` parameter provides the behaviors. | [Search Documents (preview)](/rest/api/searchservice/documents/search-post?view=rest-searchservice-2024-09-01-preview&preserve-view=true). |
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| [**Text Split skill (token chunking)**](cognitive-search-skill-textsplit.md) | Applied AI (skills) | This skill has new parameters that improve data chunking for embedding models. A new `unit` parameter lets you specify token chunking. You can now chunk by token length, setting the length to a value that makes sense for your embedding model. You can also specify the tokenizer and any tokens that shouldn't be split during data chunking. | [Create or Update Skillset (preview)](/rest/api/searchservice/skillsets/create-or-update?view=rest-searchservice-2024-09-01-preview&preserve-view=true). |
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| [**Azure AI Vision multimodal embedding skill**](cognitive-search-skill-vision-vectorize.md) | Applied AI (skills) | A new skill type that calls Azure AI Vision multimodal API to generate embeddings for text or images during indexing. | [Create or Update Skillset (preview)](/rest/api/searchservice/skillsets/create-or-update?view=rest-searchservice-2024-05-01-preview&preserve-view=true). |
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| [**Azure Machine Learning (AML) skill**](cognitive-search-aml-skill.md) | Applied AI (skills) | AML skill integrates an inferencing endpoint from Azure Machine Learning. | [Create or Update Skillset (preview)](/rest/api/searchservice/skillsets/create-or-update?view=rest-searchservice-2024-05-01-preview&preserve-view=true). In previous preview APIs, it supports connections to deployed custom models in an AML workspace. Starting in the 2024-05-01-preview, you can use this skill in workflows that connect to embedding models in the Azure AI Studio model catalog. It's also available in the portal, in skillset design, assuming Azure AI Search and Azure Machine Learning services are deployed in the same subscription. |
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| [**Azure Machine Learning (AML) skill**](cognitive-search-aml-skill.md) | Applied AI (skills) | AML skill integrates an inferencing endpoint from Azure Machine Learning. In previous preview APIs, it supports connections to deployed custom models in an AML workspace. Starting in the 2024-05-01-preview, you can use this skill in workflows that connect to embedding models in the Azure AI Studio model catalog. It's also available in the portal, in skillset design, assuming Azure AI Search and Azure Machine Learning services are deployed in the same subscription. | [Create or Update Skillset (preview)](/rest/api/searchservice/skillsets/create-or-update?view=rest-searchservice-2024-05-01-preview&preserve-view=true). |
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| [**Incremental enrichment cache**](cognitive-search-incremental-indexing-conceptual.md) | Applied AI (skills) | Adds caching to an enrichment pipeline, allowing you to reuse existing output if a targeted modification, such as an update to a skillset or another object, doesn't change the content. Caching applies only to enriched documents produced by a skillset.| [Create or Update Indexer (preview)](/rest/api/searchservice/indexers/create-or-update?view=rest-searchservice-2024-05-01-preview&preserve-view=true). |
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| [**OneLake files indexer**](search-how-to-index-onelake-files.md) | Indexer data source | New data source for extracting searchable data and metadata data from a [lakehouse](/fabric/onelake/create-lakehouse-onelake) on top of [OneLake](/fabric/onelake/onelake-overview) | [Create or Update Data Source (preview)](/rest/api/searchservice/data-sources/create-or-update?view=rest-searchservice-2024-05-01-preview&preserve-view=true). |
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| [**Azure Files indexer**](search-file-storage-integration.md) | Indexer data source | New data source for indexer-based indexing from [Azure Files](https://azure.microsoft.com/services/storage/files/) | [Create or Update Data Source (preview)](/rest/api/searchservice/data-sources/create-or-update?view=rest-searchservice-2024-05-01-preview&preserve-view=true). |
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|Feature                         | Category | Description | Availability |
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| [**Add Azure AI Search to a network security perimeter**](search-security-network-security-perimiter.md) | Service | Join a search service to a [network security perimeter](/azure/private-link/network-security-perimeter-concepts) to control network access to your search service. | The Azure portal and the [Network Security Perimeter APIs 2024-06-01-preview](/rest/api/searchmanagement/network-security-perimeter-configurations?view=rest-searchmanagement-2024-06-01-preview&preserve-view=true). |
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| [**Search service under a user-assigned managed identity**](search-howto-managed-identities-data-sources.md) | Service | Configures a search service to use a previously created user-assigned managed identity. | [Services - Update](/rest/api/searchmanagement/services/update?view=rest-searchmanagement-2024-06-01-preview&preserve-view=true#identity), 2021-04-01-preview or the latest preview version. We recommend using the latest preview version. |
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| [**Search service under a user-assigned managed identity**](search-howto-managed-identities-data-sources.md) | Service | Configures a search service to use a previously created user-assigned managed identity. | [Services - Update](/rest/api/searchmanagement/services/update?view=rest-searchmanagement-2024-06-01-preview&preserve-view=true#identity), 2021-04-01-preview, or the latest preview version. We recommend using the latest preview version. |
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## Preview features in Azure SDKs
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‎articles/search/whats-new.md

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| Item                         | Type | Description |
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| [**Add Azure AI Search to a network security perimeter**](search-security-network-security-perimiter.md) | Feature | Join a search service to a [network security perimeter](/azure/private-link/network-security-perimeter-concepts) to control network access to your search service. The Azure portal and the Management REST APIs in the [2024-06-01-preview](/rest/api/searchmanagement/network-security-perimeter-configurations?view=rest-searchmanagement-2024-06-01-preview&preserve-view=true) can be used to view and reconcile network security perimeter configurations. |
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| [**Add Azure AI Search to a network security perimeter**](search-security-network-security-perimiter.md) | Security | Join a search service to a [network security perimeter](/azure/private-link/network-security-perimeter-concepts) to control network access to your search service. The Azure portal and the Management REST APIs in the [2024-06-01-preview](/rest/api/searchmanagement/network-security-perimeter-configurations?view=rest-searchmanagement-2024-06-01-preview&preserve-view=true) can be used to view and reconcile network security perimeter configurations. |
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| [**Query rewrite in the semantic reranker**](semantic-how-to-query-rewrite.md) | Relevance | [Search Documents (2024-11-01-preview)](/rest/api/searchservice/documents/search-post?view=rest-searchservice-2024-11-01-preview&preserve-view=true), new **QueryRewritesType** property in the request.|
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| [**Document Layout skill**](cognitive-search-document-layout.md) used to analyze a document for structure and provide structure-aware chunking. This skill calls Document Intelligence and uses the Document Intelligence layout model. | Feature | [Create or Update Skillset (2024-11-01-preview)](/rest/api/searchservice/skillsets/create-or-update?view=rest-searchservice-2024-11-01-preview&preserve-view=true)|
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| [**Managed identity for keyless billing to an Azure AI multiservice subdomain**](cognitive-search-attach-cognitive-services.md). | Applied AI (skills) | You can now use a managed identity and roles for a keyless connection to Azure AI services for built-in skills processing. This capability removes restrictions for having both search and AI services in the same region. Availability is in the [Create or Update Skillset (2024-11-01-preview)](/rest/api/searchservice/skillsets/create-or-update?view=rest-searchservice-2024-11-01-preview&preserve-view=true), the Azure portal, and in the Azure SDK beta packages that provide this feature. |
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| [**Markdown parsing mode**](search-how-to-index-markdown-blobs.md), used for indexing Markdown files in Azure Storage. | Feature | [Create or Update Indexer (2024-11-01-preview)](/rest/api/searchservice/indexers/create-or-update?view=rest-searchservice-2024-11-01-preview&preserve-view=true) |
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| [**Rescoring options for compressed vectors**](vector-search-how-to-quantization.md), used for rescoring with original vectors instead of compressed vectors. Applies to HNSW and exhaustive KNN vector algorithms, using binary and scalar compression. | Feature | [Create or Update Index (2024-11-01-preview)](/rest/api/searchservice/indexes/create-or-update?view=rest-searchservice-2024-09-01-preview&preserve-view=true) |
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| [**2024-11-01-preview**](/rest/api/searchservice/search-service-api-versions?view=rest-searchservice-2024-11-01-preview&preserve-view=true) | API | Preview release of REST APIs for query rewrite, Document Layout skill, keyless billing for skills processing, Markdown parsing mode, and rescoring options for compressed vectors. |
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| [**Portal support for structured data**](search-get-started-portal-import-vectors.md) | Feature | The **Import and vectorize data** wizard now supports Azure SQL, Azure Cosmos DB, and Azure Table Storage.|
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## October 2024
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