| Count | Nature | Purpose |
|---|---|---|
| 42 | http://www.rddl.org/ | http://www.rddl.org/purposes#directory |
| 32 | http://www.w3.org/2001/XMLSchema | http://www.rddl.org/purposes#schema-validation |
| 24 | http://www.isi.edu/in-notes/iana/assignments/media-types/application/xml-dtd | http://www.rddl.org/purposes#module |
| 21 | http://www.xml.gr.jp/xmlns/relaxCore | http://www.rddl.org/purposes#schema-module |
| 16 | http://relaxng.org/ns/structure/1.0 | http://www.rddl.org/purposes#module |
| 16 | http://www.thaiopensource.com/trex | http://www.rddl.org/purposes#module |
| 6 | http://www.isi.edu/in-notes/iana/assignments/media-types/pdf | http://www.rddl.org/purposes#normative reference |
| 4 | http://www.w3.org/TR/html4/ | http://www.rddl.org/purposes#normative-reference |
| 4 | http://www.rddl.org/purposes#reference | |
| 4 | http://www.rddl.org/#resource | http://www.rddl.org/purposes#normative-reference |
| 3 | http://www.isi.edu/in-notes/iana/assignments/media-types/application/xml-external-parsed-entity | http://www.rddl.org/purposes#entities |
| 3 | http://purl.org/rss/1.0/modules/ | |
| 3 | http://www.iana.org/assignments/media-types/application/msword | http://www.rddl.org/purposes#normative reference |
| 2 | http://www.isi.edu/in-notes/iana/assignments/media-types/application/xml-dtd | http://www.rddl.org/purposes#validation |
| 2 | http://www.w3.org/2000/01/rdf-schema# | |
| 2 | http://www.w3.org/1999/xhtml | http://www.rddl.org/purposes#normative-reference |
| 2 | http://www.w3.org/1999/xhtml | http://www.rddl.org/purposes#reference |
| 2 | http://www.rddl.org/purposes#normative-specification | |
| 2 | http://schemas.xmlsoap.org/wsdl/ | http://www.w3.org/TR/wsdl |
| 2 | http://www.w3.org/TR/html4 | http://www.rddl.org/purposes#normative-reference |
| 1 | http://www.isi.edu/in-notes/iana/assignments/media-types/text/css | |
| 1 | http://www.isi.edu/in-notes/iana/assignments/media-types/text/xml-dtd | http://www.rddl.org/purposes#module |
| 1 | http://www.isi.edu/in-notes/iana/assignments/media-types/application/xml-dtd | http://www.rddl.org/purposes#notations |
| 1 | http://www.xml.gr.jp/xmlns/relaxNamespace | http://www.rddl.org/purposes#schema-validation |
| 1 | http://relaxng.org/ns/structure/1.0 | http://www.rddl.org/purposes#schema-validation |
| 1 | http://www.ascc.net/xml/schematron | http://www.rddl.org/purposes#schema-validation |
| 1 | http://www.w3.org/1999/XSL/Transform | http://www.ascc.net/xml/schematron |
| 1 | http://www.isi.edu/in-notes/iana/assignments/media-types/application/sgml-open-catalog | |
| 1 | http://www.thaiopensource.com/trex | http://www.rddl.org/purposes#schema-validation |
| 1 | http://www.isi.edu/in-notes/iana/assignments/media-types/application/zip | http://www.rddl.org/purposes#software-package |
| 1 | http://www.rddl.org/ | http://www.rddl.org/purposes#implementation |
| 1 | http://www.isi.edu/in-notes/iana/assignments/media-types/application/zip | http://www.rddl.org/purposes#JAR |
| 1 | http://www.w3.org/1999/XSL/Transform | http://www.rddl.org/purposes#implementation |
| 1 | http://www.w3.org/1999/XSL/Transform | http://www.w3.org/1999/xhtml |
| 1 | http://www.w3.org/1999/XSL/Transform | http://www.w3.org/1999/02/22-rdf-syntax-ns# |
| 1 | http://www.w3.org/1999/XSL/Transform | http://purl.org/rss/1.0/ |
| 1 | http://www.isi.edu/in-notes/iana/assignments/media-types/application/zip | http://www.rddl.org/purposes#implementation |
| 1 | http://www.isi.edu/in-notes/iana/assignments/media-types/text/html | http://www.rddl.org/purposes#implementation |
| 1 | http://www.isi.edu/in-notes/iana/assignments/media-types/text/plain | http://www.rddl.org/purposes#normative-reference |
| 1 | http://www.w3.org/TR/html4/ | http://www.rddl.org/purposes#reference |
| 1 | http://uddi.microsoft.com/extensions.xsd | http://example.org/uddi/taxonomy/hierarchical |
| 1 | http://www.systinet.com/uddi/web/doc/uddi/taxonomy.xsd | http://example.org/uddi/taxonomy/hierarchical |
| 1 | http://www.rddl.org/natures#term | http://www.rddl.org/purposes#definition |
| 1 | http://www.ascc.net/xml/schematron | |
| 1 | http://www.rddl.org/purposes#mailing-list | |
| 1 | http://www.isi.edu/in-notes/iana/assignments/media-types/application/pdf | http://www.rddl.org/purposes#normative-reference |
| 1 | http://www.w3.org/2000/10/XMLSchema | http://www.rddl.org/purposes#schema-validation |
| 1 | http://www.ietf.org/rfc/rfc2026.txt | http://www.rddl.org/purposes#normative-reference |
| 1 | http://www.w3.org/TR/html4 | http://www.rddl.org/purposes#nonnormative-reference |