This page contains a number of references about the Style Language Descriptor (SLD) which is an open standard used to define the 'styling' of a map, that is how to make it look. For definitive answers always refer to the SLD Spec.

• ArcGIS to SLD tool
• ComplexLabelingExample
• Google Maps SLD
• InlineFeature
• InLineFeature Usage
• LabelingOptions
• SLD Applications
• SLD Snippets
• SLD Validation
• SLD-POST

• SLD Intro Tutorial