OS Open Rivers is supplied as an Esri shapefile. Shapefile is an open file format to store geometry and attribute information about spatial features.
The naming of attributes between GML and Esri shapefile is different; shapefiles limit attribute names to 11 characters, whereas GML has no limit. The tables that follow map the GML attribute name to its Esri shapefile equivalent for the WatercourseLink and HydroNode features.
gml:identifier
identifier
flowDirection
flow
length
length
fictitious
fictitious
form
form
watercourseName
name1
watercourseNameAlternative
name2
startNode
startNode
endNode
endNode
centrelineGeometry
*
gml:identifier
identifier
hydroNodeCategory
formOfNode
geometry
*