In communication, they say, context is everything. Actually, “everything” consists of context and subject. Useful information is subject in context. The question is, which comes first: context or subject?
In the book era, the content search pattern was: context first, subject afterwards. That is, suppose you deliver three different products and have released three different versions of the product. Assuming only a single manual per product/version that meant you had 9 manuals, each with a page on feature X.