I'm just learning XML and am struggling with an example of an ELEMENT
definition at http://www.xmlfiles.com/dtd/dtd_elements.asp.
Specifically, the following is shown
<!ELEMENT note (to+,from,header,message*,#PCDATA)>
I do not believe that this is valid (by reading the spec at w3c.org),
and if I create a DTD/XML instance that uses it, it neither validates
using xmllint nor the online validator at http://www.stg.brown.edu/service/xmlvalid/ (which apparently uses Xmlparse).
Would someone confirm for me that this is an invalid example or explain
why not?
Thanks!
Bo 6 1288 Would someone confirm for me that this is an invalid example or explain why not?
It's invalid: #PCDATA has to come first and can only be used in a |
choice list not a , list the list must be used with a * occurrence
indiator.
(#PCDATA|aaa|bbb|ccc)*
There are other errors:
<!ELEMENT to (#CDATA)>
There is no #CDATA element content in XML. This should be #PCDATA.
David
"bo gusman" <bo@bogusville.us> wrote in message
news:cu**********@nnrp.atgi.net... I'm just learning XML and am struggling with an example of an ELEMENT definition at http://www.xmlfiles.com/dtd/dtd_elements.asp.
This sites' examples are full of errors, actually too many - they can't be
typos etc.
I wonder what has happened but certainly examples aren't well-formed
XML element declarations.
Mr. Carlisle pointed out some errors but there's just too many like:
<!ELEMENT element-name (ANY)>
this one for example could be XML DTD trick question since it's
well-formed but I doubt it's what the writer intended to demonstrate.
Specifically, the following is shown
<!ELEMENT note (to+,from,header,message*,#PCDATA)>
I do not believe that this is valid (by reading the spec at w3c.org), and if I create a DTD/XML instance that uses it, it neither validates using xmllint nor the online validator at http://www.stg.brown.edu/service/xmlvalid/ (which apparently uses Xmlparse).
Would someone confirm for me that this is an invalid example or explain why not?
with respect,
Toni Uusitalo
"Toni Uusitalo" <to**************@pandot.nu> wrote in message
news:wz***************@read3.inet.fi... <!ELEMENT element-name (ANY)>
this one for example could be XML DTD trick question since it's well-formed but I doubt it's what the writer intended to demonstrate.
under that example the page says:
"The keyword ANY declares an element with any content."
so it ISN'T what the writer tries to demonstrate.
ps. see http://www.zvon.org for good XML tutorials.
with respect,
Toni Uusitalo
/Toni Uusitalo/: <!ELEMENT element-name (ANY)>
this one for example could be XML DTD trick question since it's well-formed but I doubt it's what the writer intended to demonstrate.
It is not well-formed, nor
<!ELEMENT element-name (EMPTY)>
is. Both 'ANY' and 'EMPTY' (w/o the quotes) must appear without the
parentheses. http://www.w3.org/TR/REC-xml/#IDAN43S
--
Stanimir
"Stanimir Stamenkov" <s7****@netscape.net> wrote in message
news:37*************@individual.net... /Toni Uusitalo/:
<!ELEMENT element-name (ANY)>
this one for example could be XML DTD trick question since it's well-formed but I doubt it's what the writer intended to demonstrate.
It is not well-formed, nor
<!ELEMENT element-name (EMPTY)>
is. Both 'ANY' and 'EMPTY' (w/o the quotes) must appear without the parentheses.
http://www.w3.org/TR/REC-xml/#IDAN43S
Both are well-formed, for example this is well-formed (and valid too):
<!DOCTYPE doc [
<!ELEMENT doc (EMPTY)>
<!ELEMENT EMPTY EMPTY>
]>
<doc><EMPTY/></doc>
That's the trick thing I mentioned. Not suitable for tutorial though ;-)
with respect,
Toni Uusitalo
/Toni Uusitalo/: Both are well-formed, for example this is well-formed (and valid too): <!DOCTYPE doc [ <!ELEMENT doc (EMPTY)> <!ELEMENT EMPTY EMPTY> ]> <doc><EMPTY/></doc>
That's the trick thing I mentioned. Not suitable for tutorial though ;-)
Ops - missed that one. You're absolutely right! :-)
--
Best Regards,
Stanimir This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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