Convert OPML to ASCIIDOC

OPML, or Outline Processor Markup Language, is a file format utilized primarily for outlining data structures. Initially developed in 2000 by UserLand Software, OPML was designed to facilitate the exchange of outline-based information between different software applications. Its uses have expanded over time, notably in organizing RSS feed lists and managing hierarchical data. The OPML file extension denotes XML-based documents that offer simplicity and interoperability in transferring structured information across diverse platforms. In essence, OPML serves as a versatile tool in the realm of data organization and syndication.

The ASCIIDOC file extension stands for Ascii Document. It is a lightweight markup language used for writing documentation, articles, books, and technical content in plain text. Created in 2002 by Stuart Rackham, AsciiDoc supports structured, human-readable formats that can be converted into various output formats like HTML, PDF, and DocBook. Its simplicity and flexibility make it a preferred choice for developers and technical writers, enabling efficient content creation and collaboration.