XPath operator: boolean object != object

Standard excerpt:

If both objects to be compared are node-sets, then the comparison will be true if and only if there is a node in the first node-set and a node in the second node-set such that the result of performing the comparison on the string-values of the two nodes is true. If one object to be compared is a node-set and the other is a number, then the comparison will be true if and only if there is a node in the node-set such that the result of performing the comparison on the number to be compared and on the result of converting the string-value of that node to a number using the number function is true. If one object to be compared is a node-set and the other is a string, then the comparison will be true if and only if there is a node in the node-set such that the result of performing the comparison on the string-value of the node and the other string is true. If one object to be compared is a node-set and the other is a boolean, then the comparison will be true if and only if the result of performing the comparison on the boolean and on the result of converting the node-set to a boolean using the boolean function is true.

When neither object to be compared is a node-set and the operator is = or !=, then the objects are compared by converting them to a common type as follows and then comparing them. If at least one object to be compared is a boolean, then each object to be compared is converted to a boolean as if by applying the boolean function. Otherwise, if at least one object to be compared is a number, then each object to be compared is converted to a number as if by applying the number function. Otherwise, both objects to be compared are converted to strings as if by applying the string function. The = comparison will be true if and only if the objects are equal; the != comparison will be true if and only if the objects are not equal. Numbers are compared for equality according to IEEE 754 [IEEE 754]. Two booleans are equal if either both are true or both are false. Two strings are equal if and only if they consist of the same sequence of UCS characters.

Precedence:

Interactive xlab: [xsl:value-of] [xsl:template]