Are paragraphs without CSS classes OK?

[Geobop]

I watched the series of InDesign tutorials @ Lynda.com and am now focusing on a few specific questions.

First, I think I remember one of the tutorials saying something about classes that don't have CSS classes assigned to them. However, I can't remember the specifics.

I'm working on my first epub, and I would like to use the following CSS scheme:

1) Most paragraph tags would have no class assigned and would be styled by a simple rule in the style sheet...

 p { indent: 15px; } 

2) A special series of paragraph tags would have a different style. However, I would put these paragraphs inside div's, so the style would just look something like this:

div.footnote p { margin: 2px 15px; indent: 0; } 

3) Any remaining paragraphs that require special styling would be assigned classes. They would be the ONLY paragraph tags with classes.

Is this scheme OK, or is there a special reason I should give EVERY paragraph tag a class?

Thanks.

[Geobop · Accepted solution]

Note: I've done more research on this question, and it appears that styles aren't necessary; blank paragraph tags are perfectly fine.