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Cabbar Duzayak wrote:
> I have an XML which is similar to:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <!DOCTYPE TestData [<!ENTITY var1
> '<![CDATA[testvalue]]>'>]>
> <TestData>
> <Holder>
> <MyText
> target="http://www.yahoo.com?aa=&var1;";>Text
> Source</MyText>
> </Holder>
> </TestData>
>
> When I try to parse this, I am getting an exception:
> '<' cannot appear in attribute value.
>
> Looks like parser replaces &var1; with
> "<![CDATA[testvalue]]>",
As expected.
and since attribute values
> can not have "<" in them, this xml can not be parsed.
> And the problem goes away if I replace the entity
> definition with:
>
> <!DOCTYPE TestData [<!ENTITY var1 'testvalue'>]>
>
> However, I have to use CDATA here,
But you **cannot** use a CDATA section in an attribute value. A CDATA
section, legal only in element content, simply signals to the processor
that characters otherwise considered to be markup are to be treated as
text. A CDATA section does not do any escaping.
An entity, however, is a substitution macro, and effectively sticks
characters into the source. Wrapping them with a CDATA section doe snot
escape anything.
>cause I don't know
> what the value of "var1" can be at runtime, and it
> might contain quote characters or any other special
> characters and it will be hard to deal with various
> cases if I don't use CDATA...
Too bad, you have to escape the data before the processor sees it.
Cheers,
Tom P
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