... (1)(sic) so i have some questions; specifically about the OGL and the SRD. i'm a bit confused about the 2 acronyms. is the SRD based off the OGL? or is it the other way around? from what i understand i can use the 3.5e rules of D&D anyway i want but i have to document i'm using them , and which ones i use. ...
... (2)(sic) is there a few PNP's you can recommend i take a look at? something i can study and learn from
...
(1) - The SRD (System Reference Document) is the rules that WOTC wanted to share, in an easy to digest (and use for publisher reference) format. It took all the Open Content parts of the various d20 systems and placed them in one place.
The OGL (Open Game License) covers the rules and text released as Open Content as designated somewhere in that product. Usually at the beginning or the end somewhere near the actual License. To use the OGL you must;
1. Include the full text of the License in your product.
2. Include all Open Content you derived your content from in Section 15 (look at the format, it's important!).
3. Designate which parts of your work are Open Content and which ones are PI (Product Identity) which is the OGL way of saying IP (Intellectual Property) which is stuff covered under various copyright laws of various countries (a copyright attorney would be very helpful to consult when you're ready to publish...).
Generally, it's considered "good form" to release rules you built upon the Open Content in your game as Open Content. You HAVE to release derivative rules from other Open Content as Open Content.
Ignore the SRD. The d20 logo license no longer exists. You can't use it. You only need to worry about the OGL (and the plethora of rules out there derived from d20 games and other games released under the OGL). Here is a quick list of games derived from d20 content released under the OGL, and some games released under the OGL that did not use d20 derived content (but another system's Open Content or released original content to share as Open Content).
OGL Derived from d20 (not a complete list):
1. Pathfinder RPG
2. Mutants & Masterminds
3. Trailblazer
4. Mastercraft (Fantasy Craft, Spycraft)
5. True 20, Modern 20, Microlite 20, ...
6. Arcana Evolved and various Malhavoc Press releases (Book of Eldritch Might, Book of...)
Games released under the OGL (not a complete list):
1. FUDGE and various FATE games (Dresden Files, Starblazer Adventures, Strands of Fate, Diaspora...)
2. Action! System (you can find some files in the download section of my website, linked in sig)
Research:
Open Game License - Wikipedia, the free encyclopedia
OPEN GAMING FOUNDATION
(2) For research of games, nab a few PDFs of the games listed above (ENWorlds store is a great place to shop). Many of them are great examples of publishing with the OGL, creating d20 material, etc.
Finally, I am not a Lawyer. Do your research. See if there are legal resources at your school that might look at the OGL and advise you about copyright laws.
Also, check out the GPA (Game Publishers Association) and GAMA (Game Manufacturers Association).
Good Luck!