HTML

We have consequently created a database-generated Web catalog, which includes links to the free versions of our publications, which may be HTML summary and/or full HTML and/or PDF and/or OpenBook. The "common denominator" of the NAP publications is the OpenBook, a navigational/search envelope surrounding a page from a book (whether in HTML or via a picture of the page). Since early 2001, we have been underwriting the digitization of the text of our books, and have replaced most page images with HTML text. We currently use page images only for very new (prepublication or not yet coded) books, or very old archival publications. The OpenBook navigational envelope enables page-by-page browsing or reading, and integrates exploration mechanisms which can search the entire full-text corpus, or an entire book, or just one chapter. Discovery tools like "find more like this book" and the "skim" function can help researchers. Navigational elements and other ease-making mechanisms are sprinkled throughout (such as consistently available Tables of Contents, a "jump to page" system, etc.)