Tuesday, 10 November 2009
Attempts at cross-version compatibility
Opening a Word Document file in a version of Word other than the one with which it was created can cause incorrect display of the document. The document formats of the various versions change in subtle and not so subtle ways; formatting created in newer versions does not always survive when viewed in older versions of the program, nearly always because that capability does not exist in the previous version. Rich Text Format (RTF), an early effort to create a format for interchanging formatted text between applications is an optional format for Word, that retains most formatting and all content of the original document. Later, after HTML appeared, Word supported an HTML derivative as an additional full-fidelity roundtrip format similar to RTF, with the additional capability that the file could be viewed in a web browser.