Style guide
A style guide (also known as style manual) is a set of rules for language usage and design of documents (records). Some style guides are about things related to graphic design, such as arranging words and white space on a page. Website style guides often help with visual or technical things. Literary style guides help with choosing the best words, common errors in grammar, punctuation and spelling; and help for how to express ideas in a precise, fair and forceful way.