Fig. 2

Representation of RGMQL functions for data import/export both locally and remotely. A GMQLDataset is created by the read_GMQL() function from a local dataset (in GDM or different tab-delimited format), or from a remote dataset (specifying is_local = FALSE). Any processing is applied on the involved GMQLDataset objects, and the computation and materialization of any result (remotely or locally) is deferred until the collect() and execute() functions are called. A GMQLDataset can be created also by the read_GRangesList() function from a GRangesList. Similarly, a GRangesList can be obtained from a remote dataset through the download_as_GRangesList() function, from a local dataset through the import_GMQL() function and, in local processing only, directly from a GMQLDataset through the take() function