swish-e 2.4.7-6.1build1 (amd64 binary) in ubuntu lunar

 SWISH-Enhanced is a fast, powerful, flexible, and easy to use system
 for indexing collections of HTML Web pages, or any XML or text files like
 Open Office Documents, Open Document files, emails, and so on.
 .
 Key features:
  * Quickly index a large number of text, HTML, and XML documents
  * Use filters to index any type of files such as PDF, OpenOffice, DOC, XLS,
    PPT, MP3.
  * Includes a web spider for indexing remote documents over HTTP
  * Can use an external program to supply documents including
    records from a relational database.
  * Word stemming, soundex, metaphone, and double-metaphone indexing for
    fuzzy searching
  * Powerful Regular Expressions to select documents for indexing or exclusion
  * Limit searches to parts of documents such as certain HTML tags or to
    XML elements.
  * Index file is portable between platforms.
  * A Swish-e library is provided to allow embedding Swish-e into your
    applications for very fast searching.
 .
 You'll find ready to use examples for indexing the Debian documentation, PDF,
 OpenOffice and MSOffice files, whole Maildir, and more.