The Universities of Manchester, Melbourne and Toronto have announced new funding to develop bi- and trilateral research projects, and a declaration to establish a new International Centre for Translational Digital Health.The announcements follow the
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Sinequa s recent announcement of the availability of its enterprise search application on Azure focused heavily on the ability of cloud services to cope with the challenges of building and maintaining a search index. In this column I want to outline how a search index is created using a content processing pipeline, and touch on a few index management issues.
The Role of an Inverted File
The underlying technology of search is referred to as an inverted file. This is a list, not a database. The easiest way to think of it is as the index of a book. Every content item is given a number and then taken to pieces called tokens, which are not words. The key to compiling an index is the content processing pipeline. Natural language processing (NLP) plays a key role here: extracting entities, disambiguating personal names and normalizing dates are just a few examples. PDF documents, PowerPoint presentations and tables/Excel spreadsheets all need careful curation, as wi