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I am learning Entity Attribute Value (EAV) Model at the moment and I figured what could be a better way than to write an open source project to practise on. A client came to me with a half built craigslist website with over two hundred database tables. This got me thinking there had to be a better way to structure this data. After some googling I found EAV. As a rule I will be implementing my own favour of Model View Controller. Anyone interested in joining me, please do.
The Entity-Attribute-Value model is a row-modeling database technique most useful for heterogeneous and evolving databases, trading performance (complex ad-hoc queries are slow) for a schema that can be easily extended and modified by users. Users define item classes, attributes associated with them, and hierarchical relationships between items without any database programming. The model has become very popular in the medical informatics community, where physiological data are inherently heterog