Instance-of expressions
JSONiq follows the W3C standard for ordered and unordered expressions. The following explanations, provided as an informal summary for convenience, are non-normative.
Figure 64. InstanceofExpr
An instance expression can be used to tell whether a JSONiq value matches a given sequence type.
Example 140. Instance of expression
1 instance of integer
Result (run with Zorba): true
Example 141. Instance of expression
1 instance of string
Result (run with Zorba): false
Example 142. Instance of expression
"foo" instance of string
Result (run with Zorba): true
Example 143. Instance of expression
{ "foo" : "bar" } instance of object
Result (run with Zorba): true
Example 144. Instance of expression
({ "foo" : "bar" }, { "bar" : "foo" }) instance of json-item+
Result (run with Zorba): true
Example 145. Instance of expression
[ 1, 2, 3 ] instance of array?
Result (run with Zorba): true
Example 146. Instance of expression
() instance of ()
Result (run with Zorba): true