The result is a collection of "best practices" that address specific common problems or design elements in web sites, and thus provide building blocks out of which a usable site could be created. In this case, each guideline is specific, including short commentary, examples and references. Each guideline is also rated for the strength of support found for it, and for how important an expert panel judged it to be in creating a usable site. This enables professionals to choose the guidelines that are appropriate for their audience and context. In this case, specific advice is presented in a flexible way.

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