Saving and Loading, Exporting and Importing Graph Grammars

AGG supports not only the possibility to open and save graph grammars in XML (http://www.w3.org/TR/REC-xml) format using common DTD (http://www.w3.org/TR/REC-xml#dt-doctype) , but also exports and imports format GXL (http://www.gupro.de/GXL) and exports GTXL format (http://tfs.cs.tu-berlin.de/projekte/gxl-gtxl.html).

(GXL is an XML-based file exchange format for graphs and GTXL is an XML-based file exchange format for graph transformation systems.)

AGG uses the XML format GGX as external data format.
Menu File contains the following menu items:

• New GraGra - Create a new graph grammar.
• Open - A file open dialog helps you to search through file directories.
• Save - Save the current grammar in the current file. If the current grammar is new, a file save dialog will appear for saving.
• Save As - A file save dialog helps to search through directories. The file name will get extension .ggx.
• Open (Base) - Similar to menu item Open. But the graph layout information ( such as (X,Y) position of the nodes ) will get lost. The default graph layout algorithm of AGG will be used.
• Save As (Base) - Similar to menu item Save As. But only basis graph structure of the grammar will be saved. The graph layout information will get lost.
• Export - Exports the current grammar to
  • GXL (.gxl) format using ggx2gxl.xsl (http://tfs.cs.tu-berlin.de/agg/xml/ggx2gxl.xsl) and gxl.dtd (http://tfs.cs.tu-berlin.de/agg/xml/gxl.dtd).
  • GTXL (.gtxl) format using gts2gtxl.xsl (http://tfs.cs.tu-berlin.de/agg/xml/gts2gtxl.xsl) and gtxl.dtd (http://tfs.cs.tu-berlin.de/agg/xml/gtxl.dtd).
  A file save dialog helps you to search the file directories. In case of GXL the file name will get extension .gxl and in case of GTXL it will get .gtxl.
  
• Import - Imports an external graph from
  • GGX (.ggx) format to integrate an external graph into current grammar.
  • GXL (.gxl) format using gxl2ggx.xsl (http://tfs.cs.tu-berlin.de/agg/xml/gxl2ggx.xsl) and gts.dtd (http://tfs.cs.tu-berlin.de/agg/xml/gts.dtd) and agglayout.dtd (http://tfs.cs.tu-berlin.de/agg/xml/agglayout.dtd).
  • OMONDO XMI (.ecore) format using omondoxmi2gxl.xsl (http://tfs.cs.tu-berlin.de/agg/xml/gxl2ggx.xsl) and gts.dtd (http://tfs.cs.tu-berlin.de/agg/xml/gts.dtd) and agglayout.dtd (http://tfs.cs.tu-berlin.de/agg/xml/agglayout.dtd).
  An external graph can be integrated into the current graph grammar in place of the host graph, if the type set of a grammar contains all types of this external graph. Otherwise, the external graph will be integrated into a new generated grammar with an empty rule set and a type set similar to the type set of the external graph.
  A file load dialog helps you to search through file directories.
• Close GraGra - Closes current graph grammar. If the grammar has been changed, you will get a warning to save it.
• Quit - Exits from AGG application.

Additionally, Save, Save As and Close are also available by pop-up menu GraGra.
And finally, menu item Reload of pop-up menu GraGra allows reloading the current graph grammar.