Editing Total Information Awareness (section)

====Evidence extraction and link discovery====
[[File:EELD.gif|thumb|right|Graphic displaying a simulated application of the evidence extraction and link discovery (EELD) project]]

Evidence extraction and link discovery (EELD) developed technologies and tools for automated discovery, extraction and linking of sparse evidence contained in large amounts of classified and unclassified data sources (such as phone call records from the [[NSA call database]], internet histories, or bank records).<ref name="iaosite-eeld">{{cite web|url=http://infowar.net/tia/www.darpa.mil/iao/EELD.htm|title=Evidence Extraction and Link Discovery|work=Information Awareness Office (official website -- mirror)|access-date=2009-03-15|url-status=dead|archive-url=https://web.archive.org/web/20090215094707/http://infowar.net/tia/www.darpa.mil/iao/EELD.htm|archive-date=2009-02-15}}</ref>

EELD was designed to design systems with the ability to extract data from multiple sources (e.g., text messages, social networking sites, financial records, and web pages). It was to develop the ability to detect patterns comprising multiple types of links between data items or communications (e.g., financial transactions, communications, travel, etc.).<ref name="iaosite-eeld"/> It is designed to link items relating potential "terrorist" groups and scenarios, and to learn patterns of different groups or scenarios to identify new organizations and emerging threats.<ref name="iaosite-eeld"/>