ANN: annotations for modeling elements

CPLEX supports ANN file format for annotating modeling elements.

CPLEX enables a user to annotate elements of a model by associating (key, value) pairs with those elements. A user can annotate such modeling elements as rows, columns, indicators, and so forth. When you annotate the variables of your model, the annotations make it possible to specify the blocks of the variable partition needed to apply Benders algorithm to decompose the model.

The contents of a file of annotations are formatted in XML. CPLEX provides a data schema, annotation.xsd, in the standard distribution of the product.

For a sample annotation file, see UFL_25_35_1, an annotated model distributed with CPLEX. For more detail about annotations, see the topic Annotating a model for CPLEX in the CPLEX User's Manual.