Definition: Whatever is created when content is sorted into a structure for use.
Also referenced as:
The word form was used 8 times across 4 pages
A weak requirement might be written as: "A user is able to easily publish an article with one click of a button." This simple sentence implies the interaction (one click), the interface (a button), and introduces an ambiguous measurement of quality (easily).
As an example, I once had a client ask for a "homepage made of buttons, not just text." He had no idea that, to a web designer, a button is the way a user submits a form online. To my client, the word button meant he could change the content over time as his business changes.
A few taxonomies in this book:
A typical grocery store has a hierarchical aisle system, a heterarchical database for the clerk to retrieve product information by scanning a barcode, and sequences for checking out and other basic customer service tasks. I was even in a grocery store recently where each cart had a list of the aisle locations of the 25 most common products. A great use of hypertext.
A typical book has a sequence-based narrative, a hierarchical table of contents, and a set of facets allowing it to be retrieved with either the Dewey Decimal system at a library, or within a genre-based hierarchical system used in bookstores and websites like Amazon.com.