Querying the CTAN Database – XSD

Most of the XML files are described by an XML Schema. This XML Schema is referenced in the files by URL. Under this URL the XML Schema can be downloaded:

https://www.ctan.org/xml/3.0/catalogue.xsd

The result is an XML file as in the following listing:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="https://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
  <!--
    Copyright (c) 2016-2018 The CTAN Team
    …
  -->
  …