[xsl] What VAST areas of knowledge must be integrated to create an XSLT processor?

["Roger L Costello costello@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Hi Folks,

Last week there was a discussion on using XSLT to display the set of Unicode
characters denoted by a regular expression.

Unicode?

Regular expressions?

Those are two VAST areas of knowledge. An XSLT processor implementor must have
a mastery of them and must know how to incorporate Unicode and Regular
Expressions into his implementation.

XSLT operates on--parses--XML documents.

Parsing?

Parsing is a VAST area of knowledge. An XSLT processor implementor must have a
mastery of it and must know how to incorporate Parsing into his
implementation.

 Then there are the languages themselves--XSLT and XPath.

XSLT?

XPath?

Those languages are VAST. An XSLT processor implementor must have a mastery of
them and must know how to incorporate XSLT and XPath into his implementation.

The amount of knowledge that must be integrated to create an XSLT processor is
MINDBLOWING.

What other VAST areas of knowledge must be integrated to create an XSLT
processor?

/Roger