Re: [xml] Question about xmlSetProp

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From: Alexander Larsson (alla@lysator.liu.se)
Date: Mon Feb 15 1999 - 12:12:06 EST

On 14 Feb, Daniel Veillard wrote:
>> Ok. So attribute values are whitespace ignorant... Is
>> multiple whitespace ignored in the content too?
>> (as in <string>a b c</string> vs <string>a b c</string>)
>
> No, element content is not !
> However when elements can contain both childs and text, then you may
> have troubles with white spaces.
> <string>a b c</string> will always be saved as read, but
> <string>a <elem>b</elem> c</string> may be saved differently.
> Being able to distinguish in such elements (mixed content) whether a
> white space is significant or not is difficult.

 Ok, just so i don't make the same stupid mistake again: Exactly what
 is guaranteed about element content (which is not mixed). What
 characters do i need to escape?, which are significant and stored
 exactly? (space? tab? newline?) Is it 8bit clean?

/ Alex, not very knowledgeable about xml.

Ps. This is the DTD i use in my program. Does it have any more obvious
blunders?

<!ELEMENT diagram (diagramdata, (layer)*) >

<!ELEMENT diagramdata (attribute)* >

<!ELEMENT layer (object | group)*>
<!ATTLIST layer
   name CDATA #REQUIRED
   visible (true|false) #REQUIRED >

<!ELEMENT object ((attribute)*, connections?)>
<!ATTLIST object
   type CDATA #REQUIRED
   version NMTOKEN #REQUIRED
   id ID #REQUIRED >

<!ELEMENT connections (connection)*>

<!ELEMENT connection EMPTY>
<!ATTLIST connection
   handle NMTOKEN #REQUIRED
   to IDREF #REQUIRED
   connection NMTOKEN #REQUIRED>

<!ELEMENT group (object | group)*>

<!ELEMENT attribute (composite | int | enum | real | boolean |
                     color | point | rectangle | string | font)*>
<!ATTLIST attribute name CDATA #REQUIRED >

<!ELEMENT composite (attribute)*>
<!ATTLIST composite type CDATA #IMPLIED>

<!ELEMENT int EMPTY>
<!ATTLIST int val NMTOKEN #REQUIRED>

<!ELEMENT enum EMPTY>
<!ATTLIST enum val NMTOKEN #REQUIRED>

<!ELEMENT real EMPTY>
<!ATTLIST real val CDATA #REQUIRED>

<!ELEMENT boolean EMPTY>
<!ATTLIST boolean val (true|false) #REQUIRED>

<!ELEMENT color EMPTY>
<!ATTLIST color val CDATA #REQUIRED>

<!ELEMENT point EMPTY>
<!ATTLIST point val CDATA #REQUIRED>

<!ELEMENT rectangle EMPTY>
<!ATTLIST rectangle val CDATA #REQUIRED>

<!ELEMENT string EMPTY>
<!ATTLIST string val CDATA #IMPLIED>

<!ELEMENT font EMPTY>
<!ATTLIST font name CDATA #REQUIRED> 

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