Pass an Element or Element Tree object to construct a Schematron validator: .Schematron automatically converts these parameters to stylesheet parameters so you need not worry to set string parameters using quotes or to use XSLT.strparam().
Validating empty data from xml files
Apart from the built-in DTD support in parsers, lxml currently supports three schema languages: DTD, Relax NG and XML Schema.
All three provide identical APIs in lxml, represented by validator classes with the obvious names.
However, for translations of this document, see Technology? Documentation of intellectual property possibly relevant to this recommendation may be found at the Working Group's public IPR disclosure page.
An implementation report for XML 1.1 is available at
It will only contain log entries that appeared during the validation.
Similar to XSLT, there's also a less efficient but easier shortcut method to do one-shot Relax NG validation: lxml.etree also has XML Schema (XSD) support, using the class lxml.etree. The API is very similar to the Relax NG and DTD classes.
lxml also provides support for ISO-Schematron, based on the pure-XSLT skeleton implementation of Schematron: There is also basic support for The parser in lxml can do on-the-fly validation of a document against a DTD or an XML schema.
The DTD is retrieved automatically based on the DOCTYPE of the parsed document.
XML documents are made up of storage units called entities, which contain either parsed or unparsed data.
Parsed data is made up of characters, some of which form character data, and some of which form markup.
Since version 2.0, lxml.etree features pre-ISO-Schematron support, using the class lxml.etree.