Attributes

Lepton EDA Attributes

Legacy gEDA attributes

Please see gEDA Master Attributes List for more information.

Lepton Extensions

symbol attribute

The attribute symbol= changes meaning of symbols in schematic, that is, the way how lepton-netlist treats them. Such symbols will be processed in a special way, not as ordinary components.

The reason is that graphical=1 attribute is overloaded and the netlister has to use various tricks (e.g. in DRC) to make things done.

symbol=nc

symbol=nc, means that the symbol will be treated as a no-connect symbol. The netlister won't output its connection in the full list of schematic connections. DRC will suppress errors on connections having only one pin connected to such a symbol. The attribute is equivalent to the legacy set of attributes as follows:

graphical=1
device=DRC_Directive
value=NoConnection

Other possible future uses of the symbol= attribute are given below.

symbol=power

The attribute could be used to filter out power symbols from schematic components.

It could replace the net= and graphical= attributes, as well as some DRC attributes, to make the DRC logic more strict, and solve some net renaming issues.

symbol=schematic-port

The attribute could be used to mark ports in hierarchical schematics in order to simplify the netlister logic.