# 22. Virtuoso Functions Guide - xml_load_schema_decl

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Functions Index

## xml_load_schema_decl

returns a string with list of errors detected by XML Schema processor on reading given XML Schema definition document.
xml_load_schema_decl (in base_uri varchar, in document_uri varchar, in content_encoding varchar, in content_language varchar);
Description
Loads given file usiing base_uri. Try to parse file of XML Schema definition and check it for correctness to XML Schema specification.
Parameters
base_uri – in HTML parser mode change all absolute references to relative from given base_uri (http://<host>:<port>/<path>)
content_encoding – string with content encoding type of <document>; valid are 'ASCII', 'ISO', 'UTF8', 'ISO8859-1', 'LATIN-1' etc., defaults are 'UTF-8' for XML mode and 'LATIN-1' for HTML mode
content_language – string with language tag of content of <document>; valid names are listed in IETF RFC 1766, default is 'x-any' (it means 'mix of words from various human languages)
dtd_validator_config – configuration string of the validator, default is empty string meaning that DTD validator should be fully disabled and only critical errors should be reported
Return Types

Human readable list of errors if applicable as a varchar.

Validating XML Against a XML Schema

    declare _result varchar;
    _result := xml_load_schema_decl (
      'http://localhost.localdomain/xmlrepository',
      'persons.xsd', 'UTF-8', 'x-any');

    if (_result = '') _result := 'NO ERRORS DETECTED';

See Also

xml_validate_schema()

xml_auto_schema()

xml_view_schema

xml_validate_dtd()