ActiveNav's Discovery Center uses Oracle's 'Outside In' document filters to translate a wide range of file formats into HTML format suitable for analysis.
File format identification, regular expressions text analysis, and thematic analysis all use these filters.
For full details of the formats supported by 'Outside In', refer to Oracle's technical datasheet here: https://docs.oracle.com/outsidein/853/oit/supportdocs/ds_oitfiles_8_5_3.pdf