A Simple Object Definition Language (SODL)

Jonathan A. Borden jborden at mediaone.net
Mon Sep 28 18:26:57 BST 1998

A Simple Object Description Language (SODL)

This is a very simple way to reprasent objects in XML. This representation
is compatible with Microsoft's typelibrary which is a binary format. The
element "type" was intended to use definitions from XML-Data but if XML-Data
isn't going anywhere we may need to include a "mini-XML-Data" within the

SODL is related to XML-RPC in that objects are defined as being composed of
interfaces (i.e. interfaceDef's). This approach to object definition is
taken because it is compatible with several of the XML-RPC efforts including
John Tigue's as well as being compatible with Microsoft's COM.
First an example, then the DTD:

<objectDef uid="
" name="JABR.DataObject">
		<interfaceDef uid="
" name="IJABRDataInterface">
		<property id="1">
		<value><string>An unnamed property</string></value>


<!ELEMENT interfaceDef (name,derivedFrom,(property|method)*)>
<!ATTLIST interfaceDef
	uid CDATA #required
	version CDATA "1.0"
<!ELEMENT property (name,params?)>
<!ATTLIST property id CDATA ""
	access (get|put|getput) "getput"
	description CDATA ""
<!ELEMENT method (name,params?>
<!ATTLIST method id CDATA ""
	description CDATA ""
<!ELEMENT params (param*)
<!ELEMENT param (name, type)>
<!ATTLIST param
	type (in|out|inout|retval) #required
	id CDATA ""
<!ELEMENT derivedFrom #PCDATA>
<!ELEMENT type (long|short|string|bool ..)>
		<!- types from XML-data to be used here ->
<!ELEMENT objectDef (interfaceDef+,other)>
<!ATTLIST objectDef
	uid CDATA #required
	name CDATA #required
	transacted (not|supports|required|new) "not">

Jonathan Borden
JABR Technology Corp.
jborden at mediaone.net

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