Features Overview Leave feedback

This page contains a list of supported features. For detailed information on a particular feature, refer to the corresponding pages in the Advanced Usage section.

GroupDocs.Search provides the following indexing features:

• Create index in memory or on disk.
• Update index to take into account changed, deleted and added documents.
• Merge several indexes into one.
• Optimize index to improve search performance and to physically remove deleted documents.
• Delete indexed documents by path or by document key.
• Notify the index about renamed documents, so they are not reindexed.
• Update the version of an index created by a previous version of the library.
• Check index integrity and restore the functionality of a damaged index.
• Atomic index changes and checksum protection of index data.
• Load an index into memory completely and save an index to another folder.
• Assign attributes to indexed documents and change them without reindexing.
• Retrieve the text of indexed documents.
• Indexing reports and notifications of index operations through events.
• Ability of indexing from a file, stream or structure.
• Indexing password protected documents.
• Indexing with stop words.
• Support for indexing additional fields.
• Support for blended characters.
• Support for characters indexed as a whole word.
• Support for character replacement during indexing.
• Support for custom text extractors.
• Options for compact and metadata index.
• Ability to save extracted text in index with different level of compression.
• Document filtering during indexing.
• Deleting indexed paths from index.
• Ability to separately extract data from documents and index them.
• Support for optical character recognition (OCR) on images through a connector to an OCR engine.
• Calculation and indexing of image hashes for reverse image search.
• The ability to create a distributed search network that automatically balances the load across nodes.

GroupDocs.Search provides the following search features:

• Simple word search.
• Boolean search.
• Regular expression search.
• Faceted search.
• Case sensitive search.
• Flexible fuzzy search.
• Synonym search.
• Homophone search.
• Wildcard search.
• Phrase search with wildcards.
• Search for different word forms.
• Date range search.
• Numeric range search.
• Search by chunks (pages).
• Document filtering in search result.
• Search for different object types: text, numbers, dates, file names, document types, metadata fields, document creation/modification dates.
• Combining different types of search into one search query.
• Alias substitution in search queries.
• Perform spell check during search.
• Perform keyboard layout correction during search.
• Search queries in text or flexible object form.
• Highlighting search results in the text of the entire document or in text segments.
• Multiple simultaneous thread safe search.
• Multithreaded search with a configurable number of threads.
• Searches are not blocked by indexing, updating, deleting, merging or optimizing operations.
• Filtering search results by document attributes.
• Search reports.
• Search over several indexes simultaneously.
• Built-in support for reverse image search.