Relational Queries with Vector Properties
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A vector property has more than one element, each with a value. When used with vector properties, the relational operators are applied to corresponding vector elements in turn, left to right. A complete test passes if all the individual element tests pass.
Consider the two vector properties, A and B, with the following elements: A (a1; a2; a3) and B (b1; b2; b3). With these elements, A > B if, and only if, a1 > b1 AND a2 > b2 AND a3 > b3.
If one vector has more elements than the other, the test is only applied against the matching elements and the extra elements are ignored.
A series of relational comparisons connected by other operators apply to the most recently specified property. The following two queries are equivalent.
@shoesize > 6 AND < 10
@shoesize > 6 AND @shoesize < 10
To perform a relational query with the long-form property tag, a {/prop} can be (optionally) used to complete the clause and to improve readability. The following query is a valid property restriction.
{prop name = shoesize} > 6 & < 10{/prop}
The {/prop} construct is used to separate property clauses but it can usually be omitted, because a new property specification (either long or short) implies closure of the previous clause. It is also assumed that there is a "super" closure at the end of the query expression to close all property tags.