is the ergm-terms.Rd file the main place the Operator terms are explained?

[Martina Morris]

If so, then the Description really needs to be rewritten here, if not, then it's not clear why the Operators are listed here at all in an ergm-terms file, and they should be deleted here.

As currently structured, the Description refers only to the "durational" terms, with the caveat that their use in estimation is not supported.

What follows is 2 sections:

1. the Operator terms and their explanations.

2. A section with the title "Terms to represent network statistics included in the tergm package", which lists all of the "durational" terms. that section name needs some clarification.

So:

1. It seems like we need a short paragraph in the Description that introduces the Operators broadly if we are going to include them in this doc, otherwise, if they are introduced/explained elsewhere, they should probably be deleted here.
2. Can we standardize the nomenclature to "durational" so that the second section is "Durational terms included in the tergm package"?

[Pavel N. Krivitsky]

I don't have a strong opinion either way; operator terms are a special case of terms, so they are documented in the same file. @joycecheng's work on term indexing will probably require changing this anyway.

[Martina Morris]

Ok, so for now I'll add some text in the description about the Operator terms

[Martina Morris]

for this release: eac9f3b