pdaDrc_DirectionAttribute
This optional attributes gives a direction to a test.The direction can be in 'global' coordinates, so with all (cell) data flattened onto the final chip locations, where [x=0,y=0,angle=0] is the design area relative to the foundry wafer (1:1 projection) or reticle placement (stepper projection).
Or it can be relative to the 'direction of the light' - so assuming the signal/light goes through the waveguide / building block in a normal 'signal' way.
- X This indicates a 'global' direction - west/east
- Y This indicates a 'global' direction - north/south
- XY This indicates a 'global' direction - north/south or west/south
- Transverse This indicates a 'relative' direction - orthogonal to the signal/light propagation. This relates to the 'widening' of xsection into layer data, see the grid context.
- Longitudinal This indicates a 'relative' direction - parallel to the signal/light propagation. This relates to the 'lenghtening' of a xsection into layer data, see the grid context.
Structure
This element is simple - it does not have attributes or elements. The text that fills up the... is value used.
<direction> ... </direction>
XSD The schema file can be downloaded or viewed at xPDK_Layout.