[x3d-public] X3D regular expression (regex) improvements

[Don Brutzman]

This has come up many many times and has long been the pattern in X3D XML Schema validation.  The crucial answer remains the same.  Among other places, available at

http://www.web3d.org/specifications/X3dRegularExpressions.html#X3dPatterns

"Intermediate commas are treated as whitespace, but only allowed between each singleton value. For example, SFVec3f 3-tuple values within an MFVec3f array do not contain comma characters (but may be separated by commas and whitespace). Experience has shown that misplaced commas are a crucial indicator of malformed tuple values in large float arrays."

all the best, Don
-- 
Don Brutzman  Naval Postgraduate School, Code USW/Br       brutzman at nps.edu
Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA   +1.831.656.2149
X3D graphics, virtual worlds, navy robotics http://faculty.nps.edu/brutzman