Re: A uestion and possible problem

>I get the same results you do from our XML parser.  What do you think
>the standard predicts?

Well, the standard says:

>XML allows parameter entity references in a variety of places within
>the DTD. Parameter-entity references are always expanded immediately
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>upon being recognized, and the DTD must match the relevant rules of
>the grammar after all parameter-entity references have been
>expanded. In addition, parameter entities referred to in specific
>contexts are required to satisfy certain constraints in their
>replacement text; for example, a parameter entity referred to within
>the internal DTD subset must match the rule for markupdecl.

This seems to imply that in:

  <!DOCTYPE foo [
  <!ENTITY % pe   "'">
  <!ENTITY % pe2  '&pe;&pe;' >
  ]>

pe2 would be expanded to '''', which is illegal.

I should note that neither NXP nor lark can handle my example.