XSLT 2.0 and XPath 2.0 Programmer's Reference, 4th Edition (664 page)

The list of categories, with a few examples of characters found in each, is listed in the table below.

Category	Description	Examples
L	Letters
Lu	Upper case	A, B, Φ , Φ
Ll	Lower case	a, b, ö, λ
Lt	Title case	Dz (x01C5)
Lm	Modifier	Arabic TATWEEL (x0640)
Lo	Other	Hebrew ALEF (x05D0)
M	Marks
Mn	Non-spacing	Combining acute accent (x0301)
Mc	Spacing	Gujarati vowel sign AA (x0ABE)
Me	Enclosing	Combining enclosing circle (x20DD)
N	Numbers
Nd	Decimal digits	1, 2, 3, 4,
Nl	Numeric letters	Roman numeral ten thousand (x2182)
No	Other	Superscript 2 3 (x00B2, x00B3)
P	Punctuation
Pc	Connector	_ (x005F)
Pd	Dash	em dash (x2014)
Ps	Open	( [ {
Pe	Close	) ]}
Pi	Initial quote	(x00AB)
Pf	Final quote	(x00BB)
Po	Other	! ? ¿ (x00BF)
Z	Separators
Zs	Space	space (x0020), non-breaking space (x00A0)
Zl	Line	line separator (x2028)
Zp	Paragraph	paragraph separator (x2029)
S	Symbols
Sm	Mathematical	+<=>| ∼ ¬ ±
Sc	Currency	$ ¢ £ ¥ €
Sk	Modifier	acute accent ’ , cedilla ¸
So	Other	¦ § © °
C	Others
Cc	Control	tab (x0009), newline (X000A)
Cf	Format	soft hyphen (x00AD)
Co	Private use
Cn	Not assigned

Flags

The effect of a regular expression can be modified by setting one or more flags. These are supplied in a separate argument of the XPath function
matches()
,
replace()
, or
tokenize()
, or in a separate attribute of the XSLT instruction

. The flags are expressed as a string containing one or more of the four characters
i
,
m
,
s
, and
x
(they can be written in any order, and no harm is done if a character is repeated). This section explains the meanings of the flags.