compute-patterns (expression priority value environment)

a list of patterns

Parse an XSLT pattern expression into one or more pattern objects.

Parses an expression, resolves its namespace-, variable-, and function-references using the specified environment, and creates a pattern object for the expression (if it does not use a union) or one pattern object for each sub-expression that is being joined into the union.

The specified priority is used as the pattern-priority, and the specified value is used as the pattern-value.