HP-UX Reference (11i v2 04/09) - 5 Miscellaneous Topics (vol 9)

r
regexp(5) regexp(5)
Multiple alternative patterns in a single clause can be specified by separating individual patterns
with the vertical bar character (|
); strings matching any of the patterns separated this way will
cause the corresponding command list to be selected.
SEE ALSO
ksh(1), sh(1), fnmatch(3C), glob(3C), regcomp(3C), setlocale(3C), environ(5).
STANDARDS CONFORMANCE
<regexp.h>: AES, SVID2, SVID3, XPG2, XPG3, XPG4
Section 5−−294 Hewlett-Packard Company − 8 − HP-UX 11i Version 2: September 2004