March 2007
Intermediate to advanced
512 pages
21h 15m
English
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xs:gMonth
The primitive type xs:gMonth represents a recurring month. It can be used to specify, for example, that year-end auditing occurs in October of every year. It does not represent a number of months; to represent that, use the xs:yearMonthDuration type instead.
The lexical representation of xs:gMonth is --MM. An optional time zone may be used, as described in "Time Zones" in Chapter 19. Table B-12 lists some values of this type.
Table B-12. Values of the xs:gMonth type
|
Values |
Explanation |
|---|---|
|
Valid | |
--06 |
June |
|
Invalid | |
--06-- |
Because of an error in the first version of XML Schema, you will often see examples that use this format, but it is technically invalid |
--15 |
The month must be a valid month |
2006-06 |
The year cannot be specified |
06 |
The two leading hyphens are required |
--6 |
It must have two digits |
|
An empty value or zero-length string is not permitted |
Values of xs:gMonth can be tested for equality (or inequality) with other values of the same type, but you cannot compare them using the operators <, <=, >, or >=.
Values of this type can be cast from the xs:date and xs:dateTime types. For example, the expression xs:date("2006-05-30") cast as xs:gMonth returns an xs:gMonth value of --05. They can also be cast to and from xs:string and xs:untypedAtomic.