They allow you to connect algorithm outputs (or dataset) to the inputs of another
algorithm, creating a data flow that will be run later.
- Insert connection: to make a connection, select the
button
from the left tool bar. Then, click on the source node and finally click on
the target node.

- Restrictions: there are some restrictions that must be considered when making connections
between the different elements:
- A dataset cannot have inputs.
- The pre-processing algorithms can only receive inputs from a DataSet
or another pre-process method.
- Knowledge extraction methods can receive data from a DataSet, from a
pre-processing algorithm or from a previous method.
- The test algorithms must receive input data from a method or from a
post-processing algorithm.
- Test algorithms cannot have outputs.
- The graph cannot have any cycle.
All these restrictions are verified in exectuion time when a connection is been created.
If one of these connections is not permited, the application will show an error
message. In next figures you can see some examples of incorrect graphs.