> Examples of suitable formats for Transparent copies include plain
> ASCII without markup, Texinfo input format, LaTeX input format, SGML
> or XML using a publicly available DTD, and standard-conforming simple
> HTML designed for human modification. Opaque formats include
> PostScript, PDF, proprietary formats that can be read and edited only
> by proprietary word processors, SGML or XML for which the DTD and/or
> processing tools are not generally available, and the
> machine-generated HTML produced by some word processors for output
> purposes only.
In Section 3.... Copying in Quantity:
> If you publish or distribute Opaque copies of the Document numbering
> more than 100, you must either include a machine-readable Transparent
> copy along with each Opaque copy, or state in or with each Opaque copy
> a publicly-accessible computer-network location containing a complete
> Transparent copy of the Document, free of added material, which the
> general network-using public has access to download anonymously at no
> charge using public-standard network protocols. If you use the latter
> option, you must take reasonably prudent steps, when you begin
> distribution of Opaque copies in quantity, to ensure that this
> Transparent copy will remain thus accessible at the stated location
> until at least one year after the last time you distribute an Opaque
> copy (directly or through your agents or retailers) of that edition to
> the public.
