Where to find definitions for each standard OTBI measure?

Summary

I'd like to see the definitions or specific criteria used for defining which HCM transactions affect each of the predefined standard measures in OTBI

Content

Is there a list or spreadsheet somewhere that explains the specific definitions of each standard measure in OTBI? I've been working on some analyses covering basic employment transactions (hires, terminations, transfers, promotions, job changes, turnover rates, etc.) and I'm using some of the standard measures available in the following 2 subject areas.

• Workforce Management - Workforce Trend Real Time (-Workforce Trend)
• Workforce Management - Worker Assignment Event Real Time (-Assignment Event)

Some of the definitions seem obvious