http://www.w3.org/2001/06/grammar
simpleType Version.datatype

{http://www.w3.org/2001/XMLSchema}anySimpleType
  {http://www.w3.org/2001/XMLSchema}string
      {http://www.w3.org/2001/XMLSchema}normalizedString
          {http://www.w3.org/2001/XMLSchema}token
              {http://www.w3.org/2001/XMLSchema}NMTOKEN
                  {http://www.w3.org/2001/06/grammar}Version.datatype

Model

{NMTOKEN: pattern = \c+}

Usage

Grammar.attribs/@version, Version.attrib/@version

Fundamental Facets

equality, non-numeric, unbounded, unordered, countable infinite value space

White Space Processing

collapse

Pattern Facet

\c+