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": "attribute",
"description": "Returns the value of a specified attribute from a feature.",
"arguments": [ {"arg":"feature","description":"a feature"},
{"arg":"attribute_name","description":"name of attribute to be returned"}],
"examples": [ { "expression":"attribute( $currentfeature, 'name' )", "returns":"value stored in 'name' attribute for the current feature"}]
}