I'm a published magazine and newspaper writer but am changing my focus to travel writing.  Of course print magazines are interested in published clips specific to travel writing.  I have discovered on-line sites such as Associated Content and Constant Content where I can probably publish.  However, since these are not on-line magazines per se, do you know if my articles on these sites will be acceptable to print editors as travel clips?

Thank you for your advice. 

I'm not sure what those sites are, and I'm not totally clear about your question, but I'll take a stab at what I think you might be asking. There are some real advantages to publishing online. One is that your work can reach a wider audience and will often be archived so it is available longer. Another, as you point out, is that the clips are more easily available. If you are questioning whether online clips are as valuable as print, that is going to depend on the publication you publish in as well as the publication you submit to. Certainly, these days simply being online does not mean a publication is second-rate, but there are still venues out there that aren't as selective, and those would be of little value. Only you can decide that by the quality of the writing that appears on the site. Still, the main idea of clips is to provide a sample of how well you write on the subject. So I'd say if the site where you want to publish is reasonably acceptable, it can't hurt.