在XSD中我有一个元素x取值(a,b)
还有另一个要素y
有没有办法使用XSD,这样我可以在x的值为b时将y设为必需,如果x的值为a,则可选
解决方法
看看
XML Schema Part 0: Primer Second Edition,第
2.2.1 Occurrence Constraints节.
它说：
In general,an element is required to appear when the value of minOccurs is 1 or more. The maximum number of times an element may appear is determined by the value of a maxOccurs attribute in its declaration. This value may be a positive integer such as 41,or the term unbounded to indicate there is no maximum number of occurrences. The default value for both the minOccurs and the maxOccurs attributes is 1.
