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Cool. I have been mulling what it would be like to have a semigraphical tool to generate SQL queries (Spark,Hive,VoltDB,etc) where the user would drive a keyboard applying operators over columns, rows and relations for mapping, filtering, joining. Like VIM plus ZPL and the goal is a statistical result over some range. Why can't prolog programs generate our programs? One of my query visualizations is an origami like structure where data is joined across a relation, something like an Explain Plan on Hollywoolsd.

By analogous, I meant more generally, using some partial knowledge about a program or spec to fill in missing pieces, not types specifically.

Nice to know folks are using these techniques to do real world tasks, I always thought something like this would be first used for cleaning data. Types, properties, sketches and examples.

Three levels of relatedness, https://vimeo.com/22606387



Indeed -- check out my strangeloop talk on places we did this :) http://www.infoq.com/presentations/dsl-visualization




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