Convert HWPX (Hanword) to OPML

HWPX (Hangul Word Processor XML) is an advanced document format used by Hanword, developed by Hancom. It serves as an XML-based alternative to the proprietary HWP format, enhancing interoperability and accessibility. Introduced to improve document structure and compatibility, HWPX enables easier data exchange, integration with various applications, and better support for modern document processing workflows. It is widely used in South Korea for official documents, offering structured content representation while maintaining the rich formatting capabilities of Hanword.

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.