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

Can be set for an individual connection or for PUBLIC. You must have the SET ANY PUBLIC OPTION system privilege to set this option for PUBLIC or for another user or role.

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