Character Entity References in HTML 4 and XHTML 1.0 Here is a set of tables containing the 252 allowed entities in HTML 4 and XHTML 1.0, as described in section 24 of the official HTML 4 specifications, published by the W3C. I have divided them into my own, hopefully logical, categories: Entities for characters with special meaning in HTML and XHTML Entities for accented characters, accents, and o