Nyall Dawson 709c14391b Change expression help from free form html files to structured json
A new script then parses these json help files into the html help
contents, in a standardised manner. Previously, the function help
was a bunch of different formats and structures.

Now, a custom stylesheet can be applied (and later tweaked!) to
format these help. Eg, this commit colors variables and function
names in the syntax section for greater readability.
2015-09-02 14:22:50 +10:00

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{
"function": "touches",
"description": "Tests whether a geometry touches another. Returns true if the geometries have at least one point in common, but their interiors do not intersect.",
"arguments": [ {"arg":"geometry a","description":"a geometry"},
{"arg":"geometry b","description":"a geometry"}],
"examples": [ { "expression":"touches( geom_from_wkt( 'LINESTRING(5 3, 4 4)' ), geom_from_wkt( 'LINESTRING(3 3, 4 4, 5 5)' ) )", "returns":"true"},
{ "expression":"touches( geom_from_wkt( 'POINT(4 4)' ), geom_from_wkt( 'POINT(5 5)' ) )", "returns":"false"}
]
}