addvariablename

void  addvariablename(string aname, string vname)

In contexts with current geometry, this adds a mapping to the geometry.

int  addvariablename(int geohandle, string aname, string vname)

Adds the mapping to the given geometry. Returns the geohandle on success.

geohandle

A handle to the geometry to write to. Currently the only valid value is 0 or geoself, which means the current geometry in a node. (This argument may be used in the future to allow writing to other geometries.)

Adds the mapping of the attribute aname to the local variable vname. In SOPs that support this, you will then have the local variable $vname referencing the attribute aname. This emulates the behavior of the AttribCreate SOP.