GEGL Glossary
- connection
- 
A link/pipe routing image flow between operations within the graph goes from an output pad to an input pad, in graph glossary this might also be referred to as an edge. 
- DAG
- 
Directed Acyclic Graph, see graph. 
- graph
- 
A composition of nodes, the graph is a DAG. 
- node
- 
The nodes are connected in the graph. A node has an associated operation or can be constructed graph. 
- operation
- 
The processing primitive of GEGL, is where the actual image processing takes place. Operations are plug-ins and provide the actual functionality of GEGL 
- pad
- 
The part of a node that exchanges image content. The place where image "pipes" are used to connect the various operations in the composition. 
- input pad
- 
consumes image data, might also be seen as an image parameter to the operation. 
- output pad
- 
a place where data can be requested, multiple input pads can reference the same output pad. 
- sampler
- 
A resampling strategy used for transformations and warps. 
- property
- 
Properties are what controls the behavior of operations. Through the use of GParamSpecs properties they are self documenting via introspection.