XML Schema

Name

xs:gMonth — Recurring period of time: yearly month.

Derived from:

xs:anySimpleType

Primary:

xs:gMonth

Known subtypes:

none

Facets:

xs:enumeration, xs:maxExclusive, xs:maxInclusive, xs:minExclusive, xs:minInclusive, xs:pattern, xs:whiteSpace

<xs:simpleType name="gMonth" id="gMonth">
  <xs:restriction base="xs:anySimpleType">
    <xs:whiteSpace value="collapse" fixed="true"/>
  </xs:restriction>
</xs:simpleType>

Description

The value space of xs:gMonth is the period of one calendar month recurring each calendar year (such as the month of April); its lexical space should follow the ISO 8601 syntax for such periods (i.e., " -- MM”) with an optional timezone. However, there is a typo in the W3C XML Schema Recommendation where the format is defined as " -- MM -- -- . Even though an erratum should be published to bring the W3C XML Schema inline with ISO 8601, most of the current schema processors will expect the (bogus) format " -- MM -- -- . In the example, we follow the correct ISO 8601 format.

Restrictions

The period (one year) and the duration (one month) are fixed, and no calendars other than the Gregorian are supported.

Because of the typo in the W3C XML Schema Specification, users must choose between a bogus format, which works on the current version of the tools, or a correct format, which conforms to ISO 8601.

Example

Valid values include "--05", "--11Z", "--11+02:00", "--11-04:00", or "--02".

The following values would be invalid: "-01-" (the format must be "--MM"), "--13" (the month is ...