nesting quotes in tag attributes

[JohnWilliam Fitz]

Hi.

Are there a set of concrete rules (i.e. in the specifications or somewhere) for when tag attributes allowed to nest double quotes within double quotes?

For example, this does *NOT* work...

<c:if test="${userType eq "member"}" >

...I must change either the outer or the inner set of quotes to single quotes for it to work. In other words, no nesting of double quotes is allowed.

However, this DOES work...

<p508  508 twentythree="<%= "skidoo" %>" />

...nesting of double quotes IS allowed here.

So, what are the rules? It doesn't seem to me that the tag author has any control over it. So it must be a container specification, right?

Thanks!
John

[Seetharaman Venkatasamy]

Originally posted by JohnWilliam Fitz:

<p508  508 twentythree="<%= "skidoo" %>" />

confusing?

...nesting of double quotes IS allowed here.

So, what are the rules? It doesn't seem to me that the tag author has any control over it. So it must be a container specification, right?

i dont think so. see it is normal that how compiler understand that where is the " starting and ending ?

[JohnWilliam Fitz]

confusing?

Sorry, the tag should have read...

<p508 :-P	 508 twentythree="<%= "skidoo" %>" />

see it is normal that how compiler understand that where is the " starting and ending ?

But the container's behaviour is different in the two examples. In the first example, the container sees the second double quote in the attribute value as closing the string and then assumes what comes next is the next attribute. So I must make the inner quotes single quotes for it to be interpreted correctly.

But in the second example I gave, why doesn't the compiler or container see the second double quote as closing the string the way it did in the first example? This behaviour is documented somewhere, no?

John

[JohnWilliam Fitz]

Sorry. The smiley should be a colon followed by a p. That is truly frustrating that even when I wrap a block in [code] tags it still converts characters to smileys.

[Christophe Verré]

You can still use HTML Special Entities for the double quotes around member.

[Seetharaman Venkatasamy]

Originally posted by JohnWilliam Fitz:
That is truly frustrating that even when I wrap a block in [code] tags it still converts characters to smileys.

in this case,when you post your code please disable the smilies option which is below your UBB code option

[JohnWilliam Fitz]

You can still use HTML Special Entities for the double quotes around member.

Thanks Christopher. I will read that.

Will the exam try to test my knowledge of what situations allow nested double quotes in tag attribute values? I feel shaky on what's legit and not.

[Christophe Verré]

Will the exam try to test my knowledge of what situations allow nested double quotes in tag attribute values?

No, I don't think so.