Wikipedia: Stay on topic

From open-encyclopedia.com - the free encyclopedia.

The most readable articles contain a minimum of irrelevant (or only loosely relevant!) information. While writing an article you might find yourself digressing into a side subject. If you find yourself wandering off topic, consider placing the additional information into a different article, where it will fit more closely with the topic. If you provide a link to the other article, readers who are interested in the side topic have the option of digging into it, but readers who aren't interested won't be distracted by it.