XC (TQL)
Instead of specifying a clause parameter with a particular Item ID, it is possible to use the 'XC' characters for its value. Using 'XC' automatically creates a TQL statement for every Item ID in that clause parameter that overlaps the Search Polygon. Both the generated TQL statements and their results are handled internally as arrays.
This Search Polygon is determined by the linked content item. Since content item linkage is currently limited to Template Text and Excel Panels, XC should only be used there.
Example
Consider the following (simplified) Neighborhood data of a project:
[ {
"id" : 0, "name" : "East Side",
"polygons" : { "type" : "MultiPolygon", "coordinates" : [ [ [ [ 250.0, -500.0 ], [ 500.0, -500.0 ], [ 500.0, 0.0 ], [ 250.0, 0.0 ], [ 250.0, -500.0 ] ] ] ] }
}, {
"id" : 1, "name" : "West Side",
"polygons" : { "type" : "MultiPolygon", "coordinates" : [ [ [ [ 0.0, -500.0 ], [ 250.0, -500.0 ], [ 250.0, 0.0 ], [ 0.0, 0.0 ], [ 0.0, -500.0 ] ] ] ] }
} ]
and the Area data:
[ {
"id" : 0, "name" : "Upper Left",
"polygons" : { "type" : "MultiPolygon", "coordinates" : [ [ [ [ 110.0, -110.0 ], [ 110.0, -100.0 ], [ 100.0, -100.0 ], [ 100.0, -110.0 ], [ 110.0, -110.0 ] ] ] ] }
}, {
"id" : 1, "name" : "Upper Right",
"polygons" : { "type" : "MultiPolygon", "coordinates" : [ [ [ [ 435.0, -95.0 ], [ 425.0, -95.0 ], [ 425.0, -105.0 ], [ 435.0, -105.0 ], [ 435.0, -95.0 ] ] ] ] }
}, {
"id" : 2, "name" : "Lower Left",
"polygons" : { "type" : "MultiPolygon", "coordinates" : [ [ [ [ 165.0, -425.0 ], [ 165.0, -415.0 ], [ 155.0, -415.0 ], [ 155.0, -425.0 ], [ 165.0, -425.0 ] ] ] ] }
}, {
"id" : 3, "name" : "Lower Right",
"polygons" : { "type" : "MultiPolygon", "coordinates" : [ [ [ [ 315.0, -395.0 ], [ 325.0, -395.0 ], [ 325.0, -385.0 ], [ 315.0, -385.0 ], [ 315.0, -395.0 ] ] ] ] }
} ]
For example, a TQL statement in a Template Text Panel applied to neighborhoods creates separate instances for 'East Side' and 'West Side'.
The TQL statement
SELECT_NAME_WHERE_AREA_IS_XC
for the Text Panel linked to Neighborhood "East Side" is internally replaced with a list of TQL statements, separated by comma's,
SELECT_NAME_WHERE_AREA_IS_1, SELECT_NAME_WHERE_AREA_IS_3
Its result will be a list of names, separated by comma's, for example:
"Upper Right", "Lower Right"
Clause Parameters
The XC value can be used in the following TQL Clause parameters:
Notes
- The following variants on XC exist:
See also
API Endpoints