There is only one file type that uses the .LXK extension:
Lexicon Link-up File
Corpus Gesproken Nederlands
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An LXK file is a text file used by COREX, a program used to listen to speech files and view annotations of the Dutch language. It contains a chronological representation of annotations made during the lexicon link-up phase. LXK files are saved in the XML format.
COREX (CORpus EXploitation) software is part of the Spoken Dutch Corpus, also known as Corpus Gesproken Nederlands (CGN) project, which was intended to construct a database of contemporary Dutch spoken by people in The Netherlands and Flanders.
LXK files are located in the following directory:
NOTE: COREX is no longer developed.
Updated: January 14, 2017