Read XSLT 2.0 and XPath 2.0 Programmer's Reference, 4th Edition Online
Authors: Michael Kay
XSLT 2.0 and XPath 2.0 Programmer's Reference, 4th Edition (123 page)
The most useful properties that may be specified in the
\p
and\Pconstructs are described below; for a full list see Chapter 14.
| Property | Meaning |
| L | All letters. |
| Lu | Uppercase letters, for example, A, B, Š, Σ. |
| Ll | Lowercase letters, for example, a, b, ñ, λ. |
| N | All numbers. |
| P | Punctuation (full stop, comma, semicolon, and so on). |
| Z | Separators (for example, space, newline, no-breaking space, en space, em space). |
| S | Symbols (for example, currency symbols, mathematical symbols, dingbats, and musical symbols). |
Captured Groups
Within the., because it is provided as the context item. Sometimes, however, it is useful to be able to determine the strings that matched particular parts of the regular expression.
Any subexpression of the regular expression that is enclosed in parentheses causes the string that it matches to be available as a
captured group
. For example, if the regex([0-9]+)([A-Z]+)([0-9]+)is used to match the string13DEC1987, then the three captured groups will be13,DEC, and1987. If the regular expression were written instead as([0-9]+)([A-Z]+([0-9]+)), then the three captured groups would be13,DEC1987
