IDS 200 Lecture Notes - Lecture 17: Html, Telecommuting
12 Feb 2020
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Search is something everyone uses but doesn"t really need to think about. We try to describe what we want. Hopefully, the machines deliver what we want. Highly structured data is easy to search; less structured data complicates the process: Sorted on multiple dimensions: a name from a phone book. Categorized, then sorted: a song download on amazon. Webpages consist of text, objects (like images, buttons, and scripts), and formatting instructions. Text may be presented in a variety of fonts, colors, styles, and orientations or as hyperlinks. Objects may be included in the page and automatically constructed by the browser or pulled from databases (like. Additionally, objects can have metadata like labels, display priority, and preferred size. Webpage elements can be combined in arbitrary ways, so pages can"t be meaningfully ordered. Webpages are mostly written in html (hypertext markup. Markup languages specify how text and objects are presented to viewers. Html relies on tags: labels identifying an object or text format.
