The list of values supported for this option is identical to the list of parameters (including sub-parameters) documented for the ST_AsXML method. See ST_AsXML method for type ST_Geometry.

GML

This option is used to determine how a geometry is converted to XML. The following are the two main contexts in which the option is used:

Assignments from geometry types to XML give an error in contexts other than fetching from a client application and the CAST statement. For example, you cannot call a function or procedure that takes an XML parameter and pass a geometry, nor can you assign a geometry to an XML variable.

• ST_AsXML method for type ST_Geometry
• st_geometry_asbinary_format option
• st_geometry_astext_format option
• st_geometry_describe_type option
• st_geometry_on_invalid option
• st_geometry_asbinary_format connection property
• st_geometry_astext_format connection property
• st_geometry_asxml_format connection property
• st_geometry_describe_type connection property
• st_geometry_on_invalid connection property