Feature Representation

In addition to the generic FME feature attributes that FME Workbench adds to all features (see About Feature Attributes), this format adds the format-specific attributes described in this topic.

The xml_type attribute identifies the FME GML geometry. The valid values for this attribute are:

xml_type

Description

xml_no_geom

FME Feature with no geometry

xml_point

Point feature

xml_line

Linear feature

xml_arc

Arc feature

xml_area

Areal feature, may be a donut

Other attributes, including the feature’s feature type, are dependent on the GML application schema.

It is possible to control the name and position for the GML geometry properties for a GML feature type, see DEF Lines for details.

No Geometry

xml_type: xml_no_geom

Features having their xml_type attribute set to xml_no_geom do not contain any geometry data.

Points

xml_type: xml_point

Features having their xml_type set to xml_point are single coordinate features.

Lines

xml_type: xml_line

Features having their xml_type set to xml_line are polyline features and have at least two coordinates.

Arcs

xml_type: xml_arc

Features having their xml_type set to xml_arc are circular arc segments.

Areas

xml_type: xml_area

Features having their xml_type set to xml_area are either a single closed polyline feature (simple closed polygon), a donut, or an aggregate of donuts (and/or simple polygons). A simple closed polygon contains at least four coordinates, with the first and last coordinate being equal.