boolean Function

Converts the argument to a Boolean.

boolean boolean(object)

Remarks

Converts its argument to a Boolean as follows:

• A number is True if and only if it is neither positive or negative zero or NaN.
• A node-set is True if and only if it is non-empty.
• A string is True if and only if its length is non-zero.
• An object of a type other than the four basic types is converted to a Boolean in a way that is dependent on that type.

See Also

XML Data Types Reference