http://www.w3.org/TR/html4/loose.dtd

This is the HTML 4.01 Transitional DTD, which includes presentation attributes and elements that W3C expects to phase out as support for style sheets matures. Authors should use the Strict DTD when possible, but may use the Transitional DTD when support for presentation attribute and elements is required. HTML 4 includes mechanisms for style sheets, scripting, embedding objects, improved support for right to left and mixed direction text, and enhancements to forms for improved accessibility for people with disabilities. Draft: $Date: 2018/04/05 15:13:09 $ Authors: Dave Raggett Arnaud Le Hors Ian Jacobs Further information about HTML 4.01 is available at: http://www.w3.org/TR/1999/REC-html401-19991224 The HTML 4.01 specification includes additional syntactic constraints that cannot be expressed within the DTDs.