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"Language-Integrated Query (LINQ) includes several projection operators but none that allow multiple items to be created from each item in a sequence. This article describes a custom operator that allows several selections to be made per item."

"In an earlier blog post, Creating or modifying Entity Framework EDMX files from code: an introduction to HuagatiEDMXTools.dll, I wrote about the EDMX file wrapper that is used by the Huagati DBML/EDMX Tools add-in for parsing, updating, creating, and writing EDMX files. HuagatiEDMXTools adds an easy to use object model on top of EDMX files (see documentation at http://huagati.com/edmxtools/help ), making it a lot easier to create/read/update EDMX files, and to write LINQ queries against Entity Framework 4 metadata. It also has a number of built-in queries and lookup functions that make it a breeze to work with Entity Framework 4 EDMX files from code."

jLinq is a 100% JavaScript library that allows you to perform complex queries on arrays of JSON data.