Reputation: 65
I'm learning XML at the moment and I'm struggling with the first DTD extenstion. My XML:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<!DOCTYPE Activities [
<!ELEMENT Activities (ToDo)>
<!ELEMENT ToDo (Household,Cat,House,Bills,Groceries)>
<!ELEMENT Object (Cat,House,Bills,Groceries)>
<!ELEMENT Cat (#PCDATA)>
<!ELEMENT House (#PCDATA)>
<!ELEMENT Bills (#PCDATA)>
<!ELEMENT Groceries (#PCDATA)>
<!ATTLIST ToDo id CDATA #IMPLIED>
<!ATTLIST Object id CDATA #IMPLIED>
]>
<Activities>
<ToDo id="Household">
<Object id="Cat">
<ToDo>bathe</ToDo>
</Object>
<Object id="House">
<ToDo>vacuum</ToDo>
</Object>
<Object id="Bills">
<ToDo>pay</ToDo>
</Object>
<Object id="Groceries">
<ToDo>Buy</ToDo>
</Object>
</ToDo>
</Activities>
The XML Validation (http://xmlvalidation.com) tells me that "The content of element type "ToDo" must match" and that "The content of element type "Object" must match".
What am I doing wrong? Thanks a lot in advance!
Upvotes: 1
Views: 3158
Reputation: 3724
<!ELEMENT ToDo (Household,Cat,House,Bills,Groceries)>
For example does not allow Object as a Child but HouseHold etc, ie change Xml to:
<Activities>
<ToDo id="Household">
<HouseHold/>
<Cat>
xxx
</Cat>
<House>
yyy
</House>
.....
</ToDo>
</Activities>
whence you will clear the 'Outer' "The content of element type "ToDo" must match
Now you also have Inner ToDo items in say Cat
, ie <ToDo>bathe</ToDo>
however you DTD says:
<!ELEMENT ToDo (Household,Cat,House,Bills,Groceries
a ToDo must have a Houshold, then a Cat etc, ie it cant just be text.
also <!ELEMENT Cat (#PCDATA)>
says A Cat must only contain text.
Its not clear what you are aiming for but remove Household from <!ELEMENT ToDo (Household,Cat,House,Bills,Groceries
whence
<Activities>
<ToDo id="Household">
<Cat id="1">
bathe
</Cat>
<House id="2">
vacumm
</House>
.....
</ToDo>
</Activities>
Would satisfy the DTD
Upvotes: 1