Symbology Support
Styles
Named styles, each layer can reference 0...N styles. Order is important - 'painter model'.
Rules
Each style can have 0...N rules. Rules can have min/max scale denominators and filter expressions.
Filters
Syntax for filter expressions is very simple, you enclose variables (evaluated at runtime) in square brackets: [attribute_name].
Support for:
- Arithmetic: +, -, *, /
- Comparison: >, <, =, <>, >=, <=
- Logical operators: and, or, not
- Regular expression matching: [attribute_name].match('reg_ex')
Symbolizers
Symbolizers describe how features should appear on a map.
