XML to the rescue
Some of the challenges faced by the RPC alternatives available in the early 1990s were due to the fact that many made use of proprietary standards. This either restricted the use of the technology or required the acquisition of a commercial license to do so.
Needless to say, this was far from ideal as it meant that interoperability of systems heavily depended on the vendor of a system and what protocols/standards it opted to use.
This was all about to change with the introduction of the Extensible Markup Language (XML) as an open standard by the World Wide Web Consortium (W3C) in 1996. XML enabled data to be formatted in a document that was not only readable by both humans and machines, but in an open (text-based) format ...
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