Web document
A web document is a document that defines another document to target software applications. Web documents are widely used in the Internet. For instance, web browsers use web documents to display webpages to their end-users. Search engine robots use web documents to collect data about those webpages. Those contemporary email clients that are mobile apps use web documents to display emails without web browsers. To those end-user applications that are used to view documents of various formats, web documents may represent documents in the PDF format, graphic elements of image files, etc.
