Encyclopedia Communications › Encyclopedia Communications Tasks › Extracting a Model or Subset

Extracting a Model or Subset

Performing an extract of a model or subset creates another instance of that model or subset. The original model is the parent model; the new instance is the child model. All changes that are made to the child must be applied to the parent.

If the parent model resides on the Host Encyclopedia, the destination of the extract can only be a CSE. If the parent model resides on a CSE, the destination of the extract can be a basic install to the same encyclopedia or, in a multi-encyclopedia environment, another CSE.

When extracting in a multi-encyclopedia environment, the location of the parent model is the source encyclopedia and, the location of the child model is the destination encyclopedia.

Note: These terms always reflect the direction of the operation—from source and to destination. In Apply processing, the direction is the reverse of Extract processing. The source encyclopedia is where the child model resides. The destination encyclopedia is the location of the parent.

The advantages of creating a child model include:

• The advantage of extracting a model that resides on the Host Encyclopedia include:
  • You can offload processing against the Host and conserve resources
  • Positioning the child model on a CSE may be advantageous when most users have CSE access, but not Host access.
• The advantage of extracting multiple, discrete subsets as multiple child models of a single parent can help with load balancing by distributing subsets across different encyclopedias.