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jplace is a json format created in 2012.

#3116on PLDB 12Years Old

We have developed a unified format for phylogenetic placements, that is, mappings of environmental sequence data (e.g., short reads) into a phylogenetic tree. We are motivated to do so by the growing number of tools for computing and post-processing phylogenetic placements, and the lack of an established standard for storing them. The format is lightweight, versatile, extensible, and is based on the JSON format, which can be parsed by most modern programming languages.


Example from the web:
{ “tree”: “((A:0.2{0},B:0.09{1}):0.7{2},C:0.5{3}){4};”, “placements”: [ {“p”: [[1, −2578.16, 0.777385, 0.004132, 0.0006], [0, −2580.15, 0.107065, 0.000009, 0.0153] ], “n”: [“fragment1”, “fragment2”] }, {“p”: [[2, −2576.46, 1.0, 0.003555, 0.000006]], “nm”: [[“fragment3”, 1.5], [“fragment4”, 2]]} ], “metadata”: {“invocation”: “pplacer -c tiny.refpkg frags.fasta” }, “version”: 3,“fields”: [“edge_num”, “likelihood”, “like_weight_ratio”, “distal_length”, “pendant_length”] }
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