[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Allowed PEReference usages
Brett Kail wrote: > Hello, > > I've been reading the XML specs for some time now, and I am completely > stumped attempting to understand the restrictions on PEReferences. > Could someone please comment which pairs of definition/uses below are > allowed? An explanation or pointer to the relevant portion of the > spec as to *why* the usage is valid/invalid would be extremely > helpful. Hmm, surprised nobody else has taken this up. Of course you can't do any of these sleazy tricks in the internal subset. Of the ones marked 'Might work' below, I have this nervous feeling that I'm missing some rule. > > <!ENTITY % pe "!ELEMENT e ANY"> > <%pe;> That won't work because PE's get expanded with a space either side, so you get < !ELEMENT e ANY >, 1st space isn't allowed > > <!ENTITY % pe "ELEMENT e ANY"> > <!%pe;> Same problem, space after the ! > > <!ENTITY % pe "ELEMENT"> > <!%pe; e ANY> Same problem, <! ELEMENT > > <!ENEITY %pe " "> > <!ELEMENT%pe;e ANY> Might work. > > <!ENTITY % pe "!ELEM"> > <%pe;ENT e ANY> <!ELEM ENT, nope > > <!ENTITY % pe "ELEM"> > <!%pe;ENT e ANY> <! ELEM ENT > > <!ENTITY % pe "Y"> > <!ELEMENT e AN%pe;> Same prob > > <!ENTITY % pe "ELEMENT e"> > <!%pe; ANY> Nope > > <!ENTITY % pe "x 'value'"> > <!ENTITY % %pe;> Might work > > <!ENTITY % pe "% x 'val"> > <!ENTITY %pe;ue'> Might work, but the replacement text is 'val ue' > > In addition, how does one declare a PE that contains a literal '%'? > How about does one declare a PE that contains both a single and double > quote? Assuming that it is possible to declare a PE named 'percent' > with a literal '%', is the following allowed? Standard escaping mechanisms. > > <!ENTITY %percent; x "value"> Someone want to try this out? Might work -Tim
|
PURCHASE STYLUS STUDIO ONLINE TODAY!Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced! Download The World's Best XML IDE!Accelerate XML development with our award-winning XML IDE - Download a free trial today! Subscribe in XML format
|