xpathExpression
    The following is a list of functions in the category xpathExpression
| Function | Description | 
|---|---|
| xpathExpression | Converts value to data type xpathExpression returning xpathExpression result. | 
| xpath_node_count | The number of nodes in a node-set. | 
| xpath_node_eq | Checks for xpathExpression arg1 is equal to xpathExpression arg2 and return the boolean result. | 
| xpath_node_match | Returns true if any of the nodes matched by nodeset1 are equal to any of the nodes matched by nodeset2 or their corresponding children. |