Constructor: OpenLayers.Rule Creates a Rule.
Parameters: options - {Object} An optional object with properties to set on the rule
Returns: {<OpenLayers.Rule>}
Method: getContext Gets the context for evaluating this rule
Paramters: feature - {<OpenLayers.Feature>} feature to take the context from if none is specified.
Constructor: OpenLayers.Rule Creates a Rule.
Parameters: options - {Object} An optional object with properties to set on the rule
Returns: {<OpenLayers.Rule>}