{"action":"created","issue":{"url":"https://api.github.com/repos/alex-pirozhenko/sklearn-pmml/issues/17","labels_url":"https://api.github.com/repos/alex-pirozhenko/sklearn-pmml/issues/17/labels{/name}","comments_url":"https://api.github.com/repos/alex-pirozhenko/sklearn-pmml/issues/17/comments","events_url":"https://api.github.com/repos/alex-pirozhenko/sklearn-pmml/issues/17/events","html_url":"https://github.com/alex-pirozhenko/sklearn-pmml/issues/17","id":102927395,"number":17,"title":"Transformers and transformer pipelines","user":{"login":"jnothman","id":78827,"avatar_url":"https://avatars.githubusercontent.com/u/78827?v=3","gravatar_id":"","url":"https://api.github.com/users/jnothman","html_url":"https://github.com/jnothman","followers_url":"https://api.github.com/users/jnothman/followers","following_url":"https://api.github.com/users/jnothman/following{/other_user}","gists_url":"https://api.github.com/users/jnothman/gists{/gist_id}","starred_url":"https://api.github.com/users/jnothman/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jnothman/subscriptions","organizations_url":"https://api.github.com/users/jnothman/orgs","repos_url":"https://api.github.com/users/jnothman/repos","events_url":"https://api.github.com/users/jnothman/events{/privacy}","received_events_url":"https://api.github.com/users/jnothman/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":3,"created_at":"2015-08-25T01:20:41Z","updated_at":"2015-10-06T13:03:48Z","closed_at":null,"body":"A PMML representation of basic scikit-learn transformers and transformer pipelines / featureunions is needed for this to be more broadly useful."},"comment":{"url":"https://api.github.com/repos/alex-pirozhenko/sklearn-pmml/issues/comments/145850442","html_url":"https://github.com/alex-pirozhenko/sklearn-pmml/issues/17#issuecomment-145850442","issue_url":"https://api.github.com/repos/alex-pirozhenko/sklearn-pmml/issues/17","id":145850442,"user":{"login":"alex-pirozhenko","id":2269278,"avatar_url":"https://avatars.githubusercontent.com/u/2269278?v=3","gravatar_id":"","url":"https://api.github.com/users/alex-pirozhenko","html_url":"https://github.com/alex-pirozhenko","followers_url":"https://api.github.com/users/alex-pirozhenko/followers","following_url":"https://api.github.com/users/alex-pirozhenko/following{/other_user}","gists_url":"https://api.github.com/users/alex-pirozhenko/gists{/gist_id}","starred_url":"https://api.github.com/users/alex-pirozhenko/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/alex-pirozhenko/subscriptions","organizations_url":"https://api.github.com/users/alex-pirozhenko/orgs","repos_url":"https://api.github.com/users/alex-pirozhenko/repos","events_url":"https://api.github.com/users/alex-pirozhenko/events{/privacy}","received_events_url":"https://api.github.com/users/alex-pirozhenko/received_events","type":"User","site_admin":false},"created_at":"2015-10-06T13:03:48Z","updated_at":"2015-10-06T13:03:48Z","body":"I think the most natural way to implement pipelines in PMML would be using nested models. That will allow transformers to define their own [LocalTransformations](http://dmg.org/pmml/v4-1/Transformations.html#xsdElement_LocalTransformations), replace the schemas and pass the adjusted context to the nested model."}}