stylesheet

As nouns the difference between publisher and stylesheet

is that publisher is one who publishes, especially books while stylesheet is a document issued by a publisher informing authors how to style their works for publication.

As nouns the difference between document and stylesheet

is that document is an original or official paper relied upon as the basis, proof, or support of anything else, including any writing, book, or other instrument conveying information pertinent to such proof or support any material substance on which the thoughts of men are represented by any species of conventional mark or symbol while stylesheet is a document issued by a publisher informing authors how to style their works for publication.

As a verb document

is to record in documents.