At 2009-05-29 12:46 +0100, tom tom wrote:
I don't understand why the regex \p{{IsCJKUnifiedIdeographs}}
contains a double '{}' structure. Why doesn't \p{IsCJKUnifiedIdeographs} work?
Because the value of the regex= attribute is an attribute value template.
In an attribute value template, the single brace is a signal to
perform a "value-of" instruction with the contents as the value of
the select= expression.
Since you need actual brace brackets in the attribute, you need to
double them up in order to escape the attribute value template parsing.
This happens a lot when writing XSLT stylesheets that create Ant
scripts (a very useful design pattern).
I hope this helps.
. . . . . . . . . . . . Ken
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