XML Pocket Reference, 3rd Edition

Name

rng:param — Specifies a parameter for a datatype

XML syntax example

<element name="digit"
 datatypeLibrary="http://www.w3.org/2001/XMLSchema-
 datatypes">
 <data type="int">
  <param name="minInclusive">0</param>
  <param name="maxInclusive">9</param>
 </data>
</element>

Compact syntax example

element digit { xsd:int { minInclusive = "0" maxInclusive = "9" } }

Attributes

name

The name of the parameter (facet)

Parents

data

Description

The param element specifies a parameter that is associated with a datatype specified by a parent data element. These parameters are called facets in the context of XML Schema datatypes (Table 1-5). The XML Schema datatype library is the most common datatype library associated with a RELAX NG schema, though others are possible.

Table 1-5. XML Schema datatype facets

Facet	Description
length	Length in units
minLength	Minimum length in units
maxLength	Maximum length in units
pattern	A regular expression
minInclusive	Minimum inclusive value
maxInclusive	Maximum inclusive value
minExclusive	Minimum exclusive value
maxExclusive	Maximum exclusive value
totalDigits	Total number of digits
fractionDigits	Number of digits to the right of the decimal point

Tip

The enumeration and whitespace facets of XML Schema datatypes are not supported by RELAX NG.

See also

§5, data, list, value