Create Pre-defined Meta NodeTo create a pre-defined meta node, select one and click "Finish". The one you have selected is added to the workflow.
Create Customized Meta NodeIf you need either a different number of in- or out-ports or want to have different port types you can select one of the pre-defined meta nodes as a template and then click "Customize" to access the next page of the wizard. On this page you can add or remove in- and out-ports of the template. An icon at the bottom immediately gives you a preview of the node. When you add a port to the template you can choose the type for the port:
- data base or
- data mining port (PMML).
Inside a Meta NodeIn order to open a meta node you can either double-click it or choose "Open Subworkflow editor" from its context menu. Depending on the amount of in- and out-ports the inside of a meta node looks similar to the picture below: The in- or out-ports are fixed to the so-called workflow port bars, which can be moved and resized. The data connected to the in-port from outside appears inside the meta node editor in the in-port. And vice versa: the data connected to the inner out-port appears in the outer out-port.
Meta Nodes From OutsideMeta nodes look different to normal nodes. The background icon is not rounded and has a dark gray background. There is no status light and no progress.
States of Meta NodesA meta node does not have as many states as a node. The states of a meta node are the same as the states of a workflow. A meta node can be
- If there is at least one node inside the meta node that is neither executed nor executing.
- If at least one node is executing
- If all contained nodes are executed
Out-Ports of Meta Nodes
In addition to the state of the meta node the out-ports of a meta node also have states. A small decorator icon displays the state of the out-port.
If a port is not connected or connected to an idle node neither specs nor data are available. This is indicated by a red icon.
If a port is connected to a configured node, some specs are available. This is indicated by a yellow icon.
If a port is connected to an executed node, specs and data are available. This is indicated by a green icon.