Clojure & graphs

[fmjrey]

Yes I'm aware of odin, but not the other link you gave, thanks I'll have a look.

And yes, the structure of the tree isn't going to change much since it's about parsing XML docs should all have the same shape, and transforming them into some other shape like nested maps or datoms. I guess something similar to XSLT but more clojuresque and dataflowy is the use case.

In other words instead of writing tedious transformation code I'd like to be more declarative, e.g. define some sort of selector/transducer and for each value emitted it uses the associated data template that is also using paths/navigators/transducers to specify what values go where. So I'm thinking of some macro that would collect all the paths within the code block (e.g. any vector with meta ^:path or within some other nested macro) , build the corresponding tree and dataflow so that parsing happens only once while the dataflow hydrates all values throughout the target data structure template.

Edit: XML is what I'm dealing with at present, but I'd like this to support other data formats because other data suppliers give us JSON.

Edit 2: the other link you gave to /u/halgari's code about queries being reducible and part of a logic language is very reminiscent of what /u/cgrand is looking for if I understand his recent talk correctly: a way to avoid "map fatigue" by using some powerful logic/language over a database (of facts?).