This documentation refers to the database version of 'Extract Document Co-Citation'. There is also a non-database version of the same algorithm that I don't believe is currently documented anywhere. The concept is the same but the details are different.
Extracts the document co-citation network from an ISI database.
Each document and each referenced document in the input database is represented by a node. An edge is drawn between the nodes for two documents if and only if they were cited by a common document in your dataset.
There is a distinction drawn between documents contained in your dataset and documents in general. A document in your dataset is called a "core document". Your documents may (and probably do) reference non-core documents.
The output network of this algorithm will contain nodes representing even non-core documents.
The output network will include the following summaries of your dataset:
Load a dataset into the tool, then extract the paper-citation network and execute this algorithm.