Dear Isabel, As you can see from here http://www.w3.org/TR/xhtml1/diffs.html your markup is incorrect because you are attempted to use an old (html4) style (<em>) within a new XML based document. In XML based documents you have to use strict markup, e.g.
heading: <h1></h1> paragraph: <p></p> etc. Emphasizing some excerpt of your text should go that way as the W3C validator says: emphasized text in a paragraph: <p>Hello <em>World</em>!</p> or an emphasized paragraph: <p><em>Hello World!</em></p> And yes it is mandatory because e.g. XML interpreters won't "understand" this: <p>here is an emphasized <em>paragraph.</p></em> And an XHTML document has to be conformant with the XML markup. Regards, Janos PS. Sorry for my poor english :) 2005/10/23, Isabel Santos <[EMAIL PROTECTED]>: > Hi all, > > maybe I should know this, but I cannot even find where does w3c refers to > this, so here it goes: > I have a very simple document with a strict dtd. > on the body I have something like this: > <h1>...</h1> > <p>...</p> > <em class="nota">...</em> > while validating the document I get this message: > ___________________ > (quoting the validator) > Line 15 column 18: document type does not allow element "em" here; missing > one of "p", "h1", "h2", "h3", "h4", "h5", "h6", "div", "pre", "address", > "fieldset", "ins", "del" start-tag . > <em class="nota">..., > The mentioned element is not allowed to appear in the context in which > you've placed it; the other mentioned elements are the only ones that are > both allowed there and can contain the element mentioned. This might mean > that you need a containing element, or possibly that you've forgotten to > close a previous element. > One possible cause for this message is that you have attempted to put a > block-level element (such as "<p>" or "<table>") inside an inline element > (such as "<a>", "<span>", or "<font>"). > ___________________ > > > the question is: > I cannot find a place where w3c tells me I cannot place an inline element > directly on the body. > In fact, all I find besides references about what is it, what can it contain > and wich attributes it can handle, is a bad example of the "well formedness" > concept: > ___________________ > (quoting w3c) > CORRECT: nested elements. > <p>here is an emphasized <em>paragraph</em>.</p> > INCORRECT: overlapping elements > <p>here is an emphasized <em>paragraph.</p></em> > ____________________ > > > so, is it really mandatory that em elements (or any inline element for that > matter) should go inside block level elements, or am I missing something > here? > > Best regards, > > Isabel Santos ****************************************************** The discussion list for http://webstandardsgroup.org/ See http://webstandardsgroup.org/mail/guidelines.cfm for some hints on posting to the list & getting help ******************************************************
