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CIF Layer Specification

Layers are specified in CIF in a command with syntax

L token;

The the token can be interpreted in two ways; as the name of a layer, or as an index into a layer table. For the second interpretation, the token must of course be an integer.

layer_index Historic Name Format
0 none L layer_name;
1 NCA L layer_index;

Of these, the first entry is most common. Xic can handle both of these interpretations (see 9.7).

If the indexing is selected for layers, the index will be 1-based, and correspond to the layers, left to right, in the layer table, i.e., the leftmost (lowest) layer in the layer table is designated index 1.



Stephen R. Whiteley 2006-10-23