This module provides functions for validating XML documents represented as XmlTree.

Unlike other popular XML validation tools the validation functions return a list of errors instead of aborting after the first error was found.

Note: The validation process has been split into validation and transformation! If validate did not report any errors, transform should be called, to change the document the way a validating parser is expected to do.

Main validation filter. Check if the DTD and the document are valid.

• returns : a function which expects a complete document as XmlTree input and returns a list of all errors found.

Check if the DTD is valid.

• returns : a function which expects an XmlTree from the parser as input and returns a list of all errors found in the DTD.

Check if the document corresponds to the given DTD.

• returns : a function which expects a complete document as XmlTree input and returns a list of all errors found in the content part.

Removes doublicate declarations from the DTD which first declaration is binding. This is the case for ATTLIST and ENTITY declarations.

• returns : A function that replaces the children of DOCTYPE nodes by a list where all multiple declarations are removed.

filter for transforming a document with respect to the given DTD.

Validating parsers are expected to normalize attribute values and add default values. This function should be called after a successful validation.

• returns : a function which expects a complete XML document tree and returns the transformed XmlTree