Lock

Locks can only be attached to the output of Ravels. The Lock widget is used to fix the output of a Ravel to a particular configuration of data. After the Lock is closed (either by double-clicking on the Lock, or choosing Lock from the context menu), alterations can be made to the source Ravel without altering the output of the Lock. This makes it possible to take multiple slices of the data from one Ravel, and to work with them by assigning those slices to variables, manipulating the subset of data via additional Ravels, etc. It has a number of useful context menu commands.