On the other hand, Historians are not represented very well either. I don't think the argument that visibility is important beats the argument that accurately reflecting the requirements for accessibility as concisely as possible is the best approach for these guidelines. Getting people to read the guidelines, and interpreting them for specific groups, seems to me primarily the responsibility of the Education and Outreach group, once the Guidelines group has given them the best possible material. It may be that the EO group requests the PAGL group to produce a specific interpretation for some group such as chemistry teachers, but that seems to be beyond the scope of the current PAGL group. The first people who may be required the guidelines are people in education and there is alot of math and science representations in education.
Visibility is important.
If people do not clearly see math or science issues being addressed in the guidelines document, most will probably not go looking for help in the techniques document.