Enabling the RPG compiler to use an XML document instead of a DDS to get a file definition Merged

The standard is aimed at opening and extending the DDS format to an open XML format with any metadata (i.e.: DSPF, PRTF, PF, LF) towards modern UI.
OAMOS represents a standard to enable switches or complementary plug-ins between solutions, from ISVs to single programmers.

The structure adopted with IBM for the standard will consist of using an XML or JSON document for each record-format description. XML or JSON will contain legacy DDS definition and embed any new metadata for modern elements or properties that new devices enable.

With Open Access, you can integrate:

DSPF for GUI
PRTF for doc
PF/LF for web-services.

XML is already a standard for GUI or doc or web-services definition and if you need specific formats for specific device, many "processor language" like javascript, XSLT, .net, RPG, PHP etc... can interpret XML to build the final runtime or pre-runtime format.
This is the same with JSON for browser based GUI.

http://wiki.ibmioa.com/

XML documents or JSON could be dynamic or static.
For static XML or JSON:

They can reside on the IFS or any server or in the cloud.
They can reside on a source member. (but the back side is that literals constant cannot be Unicode)

If the path of the XML or JSON document is using a known structure (like myroot + mylib/myfile/myfmt.xml or /qsys.lib/mylib.lib/mysrcfile.file/myfmt.mbr) it can be deduced at runtime otherwise a file table (CONNECTOR) will reference the XML or JSON to DDS.

Open Access allows the business logic in RPG to drive any UI and makes RPG a multitier development environment. The Metadata Open Standard allows the DESCRIPTION of advanced UIs in an IBM backed and industry standard way.