Aperture is a Java framework for extracting and querying full-text content and metadata from various information systems. It could crawl and extract information from File system, Websites, Mail boxes and Mail servers. It supports various file formats like Office, PDF, Zip and lot more. Metadata information is extracted from image files. Aperture has a strong focus on semantics, metadata extracted could be mapped to predefined properties.

Aperture - Java framework for getting data and metadata

GATE excels at text analysis of all shapes and sizes. It provides support for diverse language processing tasks such as parsers, morphology, tagging, Information Retrieval tools, Information Extraction components for various languages, and many others. It provides support to measure, evaluate, model and persist the data structure. It could analyze text or speech. It has built-in support for machine learning and also adds support for different implementation of machine learning via plugin. 
 It has family of products: 
 GATE Developer: An integrated development environment for language processing components bundled with a very widely used Information Extraction system and a comprehensive set of other plugins. 
 
 GATE Teamware: A collaborative annotation environment for factory-style semantic annotation projects built around a workflow engine and a heavily-optimized backend service infrastructure. 

 GATE Embedded: An object library optimized for inclusion in diverse applications giving access to all the services used by GATE Developer and more.
 <img src="/AppImages/Article/gate_img1.jpg" alt="" class="float-center">

GATE excels at text analysis of all shapes and sizes. It provides support for diverse language processing tasks such as parsers, morphology, tagging, Information Retrieval tools, Information Extraction components for various languages, and many others. It provides support to measure, evaluate, model and persist the data structure. It could analyze text or speech. It has built-in support for machine learning and also adds support for different implementation of machine learning via plugin.

Gate - General Architecture for Text Engineering

OpenPipe is an open source scalable platform for manipulating a stream of documents. A pipeline is an ordered set of steps / operations performed on a document to convert from its raw form to something ready to be put into the index.
 The operations performed on documents include language detection, field manipulation, POS tagging, entity extraction or submitting the document to a search engine. OpenPipe has support to extract content from database and file system. It could extract content or metadata from any file formats.

OpenPipe is an open source scalable platform for manipulating a stream of documents. A pipeline is an ordered set of steps / operations performed on a document to convert from its raw form to something ready to be put into the index.
  The operations performed on documents include language detection, field manipulation, POS tagging, entity extraction or submitting the document to a search engine.

OpenPipe - Document Pipeline

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Aperture - Java framework for getting data and metadata

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Aperture - Java framework for getting data and metadata

Gate - General Architecture for Text Engineering

OpenPipe - Document Pipeline

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