where <geomtag> is a string used to refer to the geometry and
<ctag> is the string defined when the component is created. The integer
sdim specifies the space dimension of the geometry and it can be either
0,
1,
2, or
3.
where geometry is a link to the geometry node. The string
<ftag> is used to refer to the operation.
where <ftag> is the string defined when creating the operation.