Has anyone got examples and/or experience of generating SAP ABAP or SAPScript form code from XML that came from an external application?

This would help:

• creation of SAP-based applications in a data-driven way by automating the knowledge to do so from the export of XML from an external application
• automated inputting of knowledge from an external application into SAP applications, rather than manually copying between systems
• enable 3rd-party external tools to be used to create data, perhaps in a more easier-to-use way than could be done in SAP. Or if there was already heavy investment in training with these third party tools rather than SAP, or if the employment market favoured staff with knowledge of these tools
• enable creation of data for multiple purposes, views: those in SAP and outside SAP.
• enable inter-operability of SAP with 3rd-party external tools

I'm looking for: - experiences as to the feasibility - tools, e.g. parsers, XSLT etc. - examples