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Message: <blockquote data-quote="The Sigil" data-source="post: 1095649" data-attributes="member: 2013">The quick answer is that the d20 license and the OGL are related in the same way squares and rectangles are related.As in, "all squares are rectangles but not all rectangles are squares."All d20STL products are OGL products but not all OGL products are d20STL products.Simply put:The OGL makes you play by a certain set of "rules."  In essence, these rules are:1.) You may do anything you want with others' Open Game Content.2.) You specifically agree to avoid others' Trademarks and Product Identity (the degree to which you must avoid them - especially in how "strong" PI designations are and how "far" they carry - is still a subject of debate) unless you get permission to use them.3.) You must clearly delineate all Open Game Content in your works (again, the word "clearly" is subject to legal debate).4.) You must have authority to designate things as OGC (you must have either written permission - including another's release of content as OGC under the OGL, which constitutes written permission - or you must yourself be the creator/copyright holder of material you designate as OGC).  If you don't have this authority, you can't designate it OGC.5.) You must include the OGL with your work.6.) You must update Section 15 of the OGL when you publish to include the information required by the OGL itself (i.e., with all the entries in S15's of sources you draw from and with your own entry for your work).Now, if you also choose to publish with the d20STL you gain the benefit of written permission to use the d20 logo in conjunction with your work, which is a trademark (see #2 above) but you also agree to:7.) Not size the logo too small or put anything "over" it to obscure it.8.) Place on a cover of your work one of several designated phrases (such as "requires the Player's Handbook by Wizards of the Coast" or "requires the use of d20 Modern by Wizards of the Coast").9.) Not include character generation or advancement rules.10.) Avoid re-defining certain terms enumerated in the d20STL.Hope that helps.  Consult a lawyer for a full reading, of course, but that's the nuts and bolts of most of it.--The Sigil</blockquote>

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