--- /dev/null
+.. _fields_arch_introduction_page:
+
+******************************************
+Introduction to FIELDS module architecture
+******************************************
+
+.. image:: images/image_fields_arch.png
+ :align: center
+
+
+Generally FIELDS module architecture is presented on the scheme above.
+FIELDS module is used for analysis and post-processing of numerical simulation results. It is based upon ParaVis module, MEDReader ParaVis module plugin and MEDCoupling library.
+FIELDS module uses Python API of the ParaVis module to build presentations. Any presentation in the FIELDS module is a pipeline of the ParaVis filters, which always starts with MEDReader.
+ParaVis module API is used via medcalc Python module and CORBA services.
+
+In the FIELDS module architecture, the following parts can be distinguished:
+
+.. toctree::
+
+ fields_arch_gui.rst
+ fields_arch_medcalc_py.rst
+ fields_arch_corba_services.rst
+ fields_arch_implementation_layer.rst
+
+See also:
+
+.. toctree::
+
+ fields_arch_plot3d_implementation_example.rst
