下面是我的元素层次结构。如何检查(使用xpath)AttachedXml元素存在于主消费者的CreditReport下
<Consumers xmlns="http://xml.mycompany.com/XMLSchema">
<Consumer subjectIdentifier="Primary">
<DataSources>
<Credit>
<CreditReport>
<AttachedXml><![CDATA[ blah blah]]>
使用
boolean() XPath function
The boolean function converts its
argument to a boolean as follows:
a number is true if and only if
it is neither positive or negative
zero nor NaNa node-set is true if and only if
it is non-emptya string is true if and only if
its length is non-zeroan object of a type other than
the four basic types is converted to a
boolean in a way that is dependent on
that type
如果主消费者的CreditReport中有AttachedXml，那么它将返回true()。
boolean(/mc:Consumers
/mc:Consumer[@subjectIdentifier='Primary']
//mc:CreditReport/mc:AttachedXml)
