| http://www.w3.org/ns/prov#value | - Maguire draws an analogy to financial software; you can use a spreadsheet program to handle many basic functions, but those who want to do serious enterprise resource planning, customer relationship management, or product lifecycle management turn to packages such as SAP. Similarly, Google Earth and Bing Maps provide basic mapping functions, but for serious work you???ll turn to a commercial GIS p
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