Can I add a link to a Wikipedia or DBpedia article?

Adding links to other web resources is easy, check out FAQ 21. How do I add a new reference (link, article, book) to an existing place resource? for the step-by-step instructions. But first, if you're doing a Wikipedia article, read on:

Add a DBpedia resource link, rather than a Wikipedia article link

At Pleiades, we encourage contributors to take a couple of extra steps when dealing with Wikipedia links so users and other digital systems can get the most value out of the link. DBpedia is a database of structured information extracted from Wikipedia that we want to link with our database of structured information extracted from works on the geography of the ancient world. Specifically, we want to add links directly to DBpedia resources that correspond to the Pleiades place in question. Here's how:

If you're starting from a Wikipedia article, for example, Via Labicana, you'll need to look up the corresponding DBpedia resource. Take the URL for the Wikipedia article (e.g., http://en.wikipedia.org/wiki/Via_Labicana) and replace everything up to the final slash with the appropriate DBpedia prefix (http://dbpedia.org/resource/). That results in a URI that uniquely identifies the place in question, e.g., http://dbpedia.org/resource/Via_Labicana. To make sure that everything's gone right, pop that URI into your browser's location bar and make sure you get a page. Note that DBpedia will redirect you to a "page" URL like http://dbpedia.org/page/Via_Labicana. That's because it can tell you're using a web browser and it knows you can't read an ancient place itself; you need a page about the place.

Now follow the instructions in FAQ 21 to add the link. For "specific citation" something like "DBpedia, Via Labicana" is sufficient and appropriate.