Single sourcing, according to the ubiquitous Wikipedia, is a “content management method which allows the same source content to be used across different forms of media and more than one time.” (http://en.wikipedia.org/wiki/Single_source_publishing). The benefits are obvious: the maintenance and editing of the source content have only to be done in one place at one time, thus making the editing process more efficient (quicker) and less prone to error. Most technical writers have become single source evangelists because we don’t want to spend our time editing the same piece of content in exactly the same way in several different places. It’s boring, it’s inefficient, and it’s expensive. Root canal surgery (with the right anesthesia) would be preferable.
Wikipedia defines single sourcing as “a content management method which allows the same source content to be used across different forms of media and more than one time. The labor-intensive and expensive work of editing need only be carried out once, on only one document. This reduces the potential for error, as corrections are only made one time in the source document.” A decent, I think, explanation of what this mysterious approach to documentation is all about.
Often, the quickest way to get a document deployed is to write it in a Word doc, create a PDF, and post it somewhere for users to access. This happens a lot for both end user and developer documentation. So why, then, is distributing PDF files for online reading a top web usability gaffe?