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| cast as | Creates a new value of a specific type
based on an existing value input-expression cast as target-type 5 cast as integer |
| castable as | Tests if a given value can be cast
into a given target type without error. Returns
boolean. expression castable as target-type $size castable as xs:integer |
| instance of | Returns boolean if the value of the
first operand matches the type given in the second
operand3 instance of xs:integerwould return “ true ” |
| treat as | At run time, here is the type you
should have; postpone all checking till then, and fail then
if the type is wrong. The idea is to make static checking
work until dynamic checking cuts in at runtime. May be
useful for elements that can have two very different
potential models (an integer or the code words "not
applicable"; quantity-on-hand as a number or as the word
“out-of-stock”, any Address or a more
restricted “United States Address”, etc.)
$myaddress treat as element(*, USAddress) |
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