White papers

An extended introduction to Xpress-Mosel presented with the aid of examples. Language aspects covered include types, data structures, file I/O, statements, built in functions, and modules. Embedding a Mosel model in another application using the Mosel callable libraries is also covered. Further examples show how Mosel interacts with the Optimizer to implement solution methods, including a binary fixing heuristic and a quadratic programming (QP) example.

This new version includes a section on writing modules.

ODBC is a protocol for working with databases as external data source. It can also be used to access data in spreadsheets such as MS Excel.

The Mosel module mmodbc provides access to ODBC functionality from within Mosel models and allows Mosel to read and write both sparse and dense data formats to/from any ODBC compatible soource. The aim of this document is to explain the different features of the mmdocb module by means of a collection of examples.

Three Mosel examples showing how optimization algorithms can be implemented using a combination of the Mosel language and the Mosel callable libraries.

This paper describes the I/O drivers of the Mosel distribution with examples of their use. With only minimal changes to his models the user may switch between data sources of different formats. The interaction and exchange of data between a model and the application executing it can be made more immediate and as a consequence, more efficient. It is also possible to avoid the creation of physical intermediate files by performing all operations in memory. The latter may be useful, for instance, in distributed applications.

With the help of the Mosel Native Interface (NI) the user may also implement his own drivers. We introduce some applications of this feature: a driver for working with compressed files and an example generating C code with a Mosel model.