Blueprint CSS and Separation of Presentation and Content When Designing Forms

Is it possible to use Blueprint CSS and maintain a a respectable level of separation between presentation and content? I like how easy the framework is to use when designing forms, but am worried that the manner in which I use the css classes for columnizing elements is a bad practice.

For instance, say I have a 3 field form designed using blueprint:

<div class="container">
    <form开发者_如何转开发 action="" method="post" class="inline">               
        <fieldset> 
            <legend>Example</legend> 
            <div class="span-3"> 
                <label for="a">Label A:</label> 
                <input type="text" class="text" id="a" name="a" > 
            </div> 
            <div class="span-2"> 
                <label for="b">Label B:</label> 
                <input type="text" class="text" id="b" name="b" > 
            </div> 
            <div class="span-3"> 
                <label for="o">Label O:</label> 
                <input type="checkbox" id="o" name="o" value="true" checked="checked" class="checkbox">checkbox one
            </div> 
            <div class="span-2 last"> 
                <input type="submit" value="submit" class="button"> 
            </div> 
        </fieldset> 
    </form> 
</div>

Is using a class attribute with names like "span-2", "inline", and "last" a bad practice? Or am I missing the point?

UPDATE

This is talked about in more depth at: THE MYTH OF CONTENT AND PRESENTATION SEPARATION

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I'd say you're missing the point. If you want to style those elements you're going to have to give them a class or ID regardless, and any naming convention can become meaningful so long as it remains consistent. The people who like to complain about the names of your classes generally aren't very good designers.

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I would say it is bad practice. You should be coming up with more meaningful class names and ids that apply directly to your markup and then have those "use" things such as span-2 and last. This can be done using blueprint's compress.rb.

Details on using that can be found here: http://jdclayton.com/blueprints_compress_a_walkthrough.html

In particular to what you are talking about, you should be paying attention to the "semantic_classes" part.