is it possible to import analytics models in pmml-format, that do not use algorithms provided by the Analytics UI?
E.g. is it possible to upload a SVM-model written in Python and converted to Pmml, eventhough SVM are not a usable, when creating a model with Thingworx Analytics?
Yes you can import pmml files from other source even if they use algorithm not available in ThingWorx Analytics.
The below 2 articles will be of interest here:
Note though that SVM is available in ThingWorx Analytics for boolean goals. It is not one of the learners selected by default but it can be added. See Learners and Ensemble Techniques in Help Center.