http://www.yworks.com/xml/graphml

elements
ArcEdge
BezierEdge
ColumnNodeLabelModel
ColumnNodeLabelModelParameter
GenericEdge
GenericGroupNode
GenericNode
GroupNode
ImageNode
PolyLineEdge
PortConstraint
Postprocessors
ProxyAutoBoundsNode
ProxyShapeNode
QuadCurveEdge
Resources
RowNodeLabelModel
RowNodeLabelModelParameter
ShapeNode
SimpleStyle
SplineEdge
TableNode

complexTypes
ArcEdge.type
ArcEdge.type.Arc
DropShadow.type
Edge.type
Edge.type.Arrows
EdgeLabel.type
EdgePort.type
FloatInsets.type
GenericEdge.type
GenericEdge.type.UserData
GenericGroupNode.type
GenericGroupNode.type.State
GenericNode.type
Geometry.type
GroupNode.type
GroupNode.type.Shape
GroupNode.type.State
Icon.type
ImageNode.type
ImageNode.type.Image
Insets.type
IntInsets.type
Label.type
Label.type.LabelModel
Label.type.ModelParameter
LineStyle.type
Node.type
Node.type.Fill
NodeLabel.type
Path.type
Path.type.Point
PolyLineEdge.type
PolyLineEdge.type.BendStyle
PortConstraint.type
Postprocessors.type
Processor.type
Processor.type.Option
ProxyShapeNode.type
ProxyShapeNode.type.Realizers
QuadCurveEdge.type
Rectangle.type
Resource.type
ResourceBlock.type
ShapeNode.type
ShapeNode.type.Shape
StyleProperties.type
StyleProperty.type
Table.type
Table.type.Columns
Table.type.Rows
TableColumn.type
TableNode.type
TableNodeLabelModel.type
TableNodeLabelModelParameter.type
TableRow.type
UserData.type

simpleTypes
alignment.type
arc.type
arrowType.type
autoSizePolicy.type
color.type
edgeLabelModel.type
edgeLabelPosition.type
fontStyle.type
horizontalTextPosition.type
lineType.type
nodeLabelModel.type
nodeLabelPosition.type
portConstraint.Endpoint.type
portConstraint.Side.type
preferredPlacement.type
shapeType.type
verticalTextPosition.type

attributeGroups
Location.group
OpRectangle.group
Rectangle.group