Convert OPML to XML

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.

XML, or Extensible Markup Language, is a widely used file extension in computer technology. It is designed to store and transport data, enabling structured information exchange between different systems. XML files are both human- and machine-readable, making them versatile for various applications, including web services, configuration files, and data storage. Originating in the 1990s, XML was developed by the World Wide Web Consortium (W3C) to simplify data interchange and ensure platform independence. Its flexibility and extensibility have made it a standard in many IT environments, fostering seamless integration and data sharing across diverse platforms.