@User Yes, this can be done in various ways. One simple approach is the following. Consider below schematic, it instantiates 2 opamps: If you want to attach a netlist to the symbol descend into the symbol, press 'q' (with no elements selected) to bring up the global attributes dialog box, add a

device_model=""

attribute, then in the listbox at the right-top of the dialog box select the

device_model

you just created, you can use the 'Load' button in the dialog box to load a file (model or .subckt definition) for the symbol. When creating the netlist the device_model is dumped into the netlist only once, even if you have multiple instances, like this:

** sch_path: /home/schippes/.xschem/xschem_library/test_sym_with_netlist.sch
**.subckt test_sym_with_netlist PLUS OUT MINUS
*.ipin PLUS
*.opin OUT
*.ipin MINUS
X1 PLUS MINUS VCC VSS OUT AMPLIFIER
X2 PLUS MINUS VCC VSS OUT AMPLIFIER
**.ends
**** begin user architecture code
.subckt AMPLIFIER PLUS MINUS VCC VSS OUT
* something here....

.ends
**** end user architecture code
.end

The section between the ** begin .. ** end sections is the device_model attribute. There are other ways, for example you might want t create an empty schematic with just the I/O pins, and insert a 'code.sym' symbol with the definition of the schematic expressed as netlist code instead of drawing the actual circuit. The advantage of this first approach is that you don't even need to have a schematic view, you only need a .sym view.