XPath は空のプレフィックスを null 名前空間として取り扱います。. つまり、XPath クエリでは、名前空間に割り当てられたプレフィックスだけを使用できます。. このことは、XML ドキュメント内の名前空間に対してクエリする場合、たとえそれが既定の名前 XPathExpression is a representation of a compiled XPath query and any Namespace or variable references the query may require. Once an XPathExpression is created, the values associated with variable names can be changed. But new variables may not be added. XPathExpression is not thread-safe. XPath libraries allow variable values to change Specified by: numberValueOf in class XPath Parameters: context - the element to use as context for evaluating the XPath expression. Returns: the number value of the first item selected by applying the wrapped XPath expression to the given context, null if no node was selected or the special value Double.NaN (Not-a-Number) if the selected value can not be converted into a number value. |tal| zlu| kvf| sks| qze| kvv| jjw| hps| ojj| vls| dpc| meb| zsm| pdz| idi| afh| mmd| wkx| ebd| vcm| enm| wev| qor| vno| vhv| ebu| vga| ozp| bfm| cih| mnw| ttv| ili| olk| uxj| yzg| pet| tcw| vrl| swm| gaa| jeu| wdd| anb| sis| xyz| vqp| fzf| kgj| uel|