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#############################################################################
##
#W xmltree.gi OpenMath Package Andrew Solomon
#W Marco Costantini
##
#Y Copyright (C) 1999, 2000, 2001, 2006
#Y School Math and Comp. Sci., University of St. Andrews, Scotland
#Y Copyright (C) 2004, 2005, 2006 Marco Costantini
##
## The main function in this file converts the OpenMath XML into a tree
## (using the function ParseTreeXMLString from package GapDoc) and
## parses it.
##
InstallGlobalFunction( OMParseXmlObj, function ( node )
local obj;
if not IsBound( OMObjects.(node.name) ) then
Error( "unknown OpenMath object ", node.name );
fi;
if IsBound( node.content ) and
IsList( node.content ) and
not (node.name = "OMSTR" or node.name = "OMI" or node.name = "OMB") then
node.content := Filtered( node.content, OMIsNotDummyLeaf );
fi;
obj := OMObjects.(node.name)( node );
if IsBound( node.attributes.id ) then
OMTempVars.OMREF.( node.attributes.id ) := obj;
fi;
return obj;
end );
InstallGlobalFunction( OMgetObjectXMLTree, function ( string )
local node;
# TODO: this maybe be reset in the middle of the session
# making references invalid. We need either to keep this
# for the whole session or to create another record to
# store such objects
OMTempVars.OMBIND := rec( );
OMTempVars.OMREF := rec( );
node := ParseTreeXMLString( string ).content[1];
# DisplayXMLStructure( node );
node.content := Filtered( node.content, OMIsNotDummyLeaf );
return OMParseXmlObj( node.content[1] );
end );
#############################################################################
#E
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