Perl module for detecting ignorable whitespace


The XML::Filter::DetectWS module is a PerlSAX filter that detects which character data contains ignorable whitespace and optionally filters it.

The XML spec defines ignorable whitespace as the character data found in elements that were defined in an <!ELEMENT> declaration with a model of 'EMPTY' or 'Children' (Children is the rule that does not contain '#PCDATA').

In addition, XML::Filter::DetectWS allows the user to define other whitespace to be ignorable. The ignorable whitespace is passed to the PerlSAX Handler with the ignorable_whitespace handler, provided that the Handler implements this method. Otherwise it is passed to the characters handler. If the SkipIgnorableWS is set, the ignorable whitespace is simply discarded. XML::Filter::DetectWS also takes xml:space attributes into account.

CDATA sections are passed in the standard PerlSAX way (i.e. with surrounding start_cdata and end_cdata events), unless the Handler does not implement these methods. In that case, the CDATA section is simply passed to the characters method.

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