Specification

Introduction
The purpose of this meta tag extension—which is already is somewhat common usage—is to credit the designer(s) responsible for the visual presentation of a website. Values may include persons, businesses, and organizations. If more than one individual or group is responsible for the design of a website, each may be included in a comma-separated list (spaces are optional, but are considered good usage).

Example 1
<meta name="designer" content="name">

Example 2
<meta name="designer" content="name1, name2, name3">

This page contains the HTML5 meta tag specification for the proposed 'designer' extension.