Error while creating relationship - "Choose the key from allowed namespace"

Scenario	You are trying to enhance standard data model by creating new entity types and creating relationships.
Issue	Error when trying to create a leading relationship for new entity type (SU type-4) on entity type-1 .
Error Screenshot
Solution	Create new relationship by prefixing ZZ i.e., ZZMATMARC1

MDG - Web Workbench for Data Modeling

You can use MDG's Web Workbench to do normal MDG data modeling tasks using below url

http://<host>:<ITS-Port>/sap/bc/webdynpro/sap/wda_mdg_dt_conf_workbench?FROM_TRANS=X&sap-client=800&sap-language=EN#

How to know generated tables for MDG Data Model

Purpose	Know details of generated tables for MDG data models.
Report (SE38)	USMD_DATA_MODEL

MDG menu not visible on NWBC. Instead, It shows an error “The user menu tree for user is empty."

Issue	MDG menu not visible on NWBC. Instead, It shows an error “The user menu tree for user is empty."
Error Screenshot
Solution	Role is assigned but folder is defined as a "link collection" instead of a "service map" - see:http://goo.gl/OEq9qa
Steps to solution	Step-1: Goto transaction PFCG Step-2: Open your Role in edit mode.  Step-3: Goto ‘Menu’ Tab. Step-4: Double click on the folder in which your views are defined. If no folder defined, then create one and move the views to this folder. Step-5: Click on ‘Other Node Details’ button Step-6: Select ‘Folder Option’ as ‘As Service Map' Step-7: Save & Execute NWBC
Solution Screenshot
References	1378659 - NWBC known issues & what to check when opening a ticket https://websmp208.sap-ag.de/~sapidb/012003146900001035042013E/empty_user_menu.pdf

Regular - Security

Role-Id	Name/Description
SAP_MDG_ADMIN [External]	Master Data Governance Administrator

Custom Objects - Security

Role-Id	Name/Description
SAP_MDGX_MENU_04 [External]	For self-defined objects
SAP_MDGX_FND_SAMPLE_SF_04 [External]	For self-defined objects – Flight Data Model example

Financials - Security

Role-Id	Name/Description
SAP_MDGF_ACC_DISP_04	Accounting Display
SAP_MDGF_ACC_REQ_04 [External]	Accounting Requester
SAP_MDGF_ACC_SPEC_04 [External]	Accounting Specialist
SAP_MDGF_ACC_STEW_04 [External]	Accounting Data Steward
SAP_MDGF_CO_DISP_04 [External]	Accounting Data Steward
SAP_MDGF_CO_REQ_04 [External]	Consolidation Requester
SAP_MDGF_CO_SPEC_04 [External]	Consolidation Specialist
SAP_MDGF_CO_STEW_04 [External]	Consolidation Data Steward
SAP_MDGF_CTR_DISP_04 [External]	Controlling Display
SAP_MDGF_CTR_REQ_04 [External]	Controlling Requester
SAP_MDGF_CTR_SPEC_04 [External]	Controlling Specialist
SAP_MDGF_CTR_STEW_04 [External]	Controlling Data Steward

Material - Security

Role-Id	Name/Description
SAP_MDGM_MENU_04	Menu
SAP_MDGM_DISP_04	Display
SAP_MDGM_REQ_04	Requester
SAP_MDGM_SPEC_04	Specialist
SAP_MDGM_STEW_04	Data Steward

Customer - Security

Role-Id	Name/Description
SAP_MDGC_MENU_04	Menu [External]
SAP_MDGC_DISP_04	Display [External]
SAP_MDGC_REQ_04	Requester [External]
SAP_MDGC_SPEC_04	Specialist [External]
SAP_MDGC_STEW_04	Data Steward [External]
SAP_MDGC_CL_MENU_04	(ERP Customer UI): Menu[External]
SAP_MDGC_LCC_MENU_04	(Lean Request UI): Menu[External]
SAP_MDGC_LCC_REQ_04	(Lean Request UI):Requester [External]

Supplier - Security

Role-Id	Name/Description
SAP_MDGS_MENU_04	Menu [External]
SAP_MDGS_DISP_04	Display [External]
SAP_MDGS_REQ_04	Requester [External]
SAP_MDGS_SPEC_04	Specialist [External]
SAP_MDGS_STEW_04	Data Steward [External]
SAP_MDGS_VL_MENU_04	(ERP Vendor UI): Menu[External]
SAP_MDGS_LVC_MENU_04	(Lean Request UI): Menu[External]
SAP_MDGS_LVC_REQ_04	(Lean Request UI):Requester [External]

Business Partner - Security

Role-Id	Name/Description
SAP_MDGBP_MENU_04 [External]	Menu
SAP_MDGBP_DISP_04 [External]	Display
SAP_MDGBP_REQ_04 [External]	Requester
SAP_MDGBP_SPEC_04[External]	Specialist
SAP_MDGBP_STEW_04 [External]	Data Steward

Transaction Codes - MDG - Quick Reference

#	Item	Detail/Comment
1	CA-MDG: General	MDGIMG - Master Data Governance Customizing DRFOUT - Execute Data Replication MDGDT - Configuration Workbench DRFLOG - Analyze Replication Log USMD_RULE - Validations and Derivations MDG_TR_DEST - Destination for Transport Methods MDG_TR_WZ - RFC Connection Wizard USMD_SSW_RULE - Process Definition of RBWF
2	CA-MDG-DRF: Data Replication Framework	DRFOUT - Execute Data Replication DRFLOG - Analyze Replication Log
3	CA-MDG-DT: Design Time	MDGDT - Configuration Workbench
4	CA-MDG-AF: Application Framework	USMD_RULE - Validations and Derivations MDG_TR_DEST - Destination for Transport Methods MDG_TR_WZ - RFC Connection Wizard USMD_SSW_RULE - Process Definition of RBWF

Relationships - Quick Reference

From Entity Type	To Entity Type	Relationship Type	Cardinality	Note/Comments
Entity Type -1 Changeable via Change Request ; Generated database tables	Entity Type - 4 Changeable via Other entity type ; Generated database tables	Leading	1:1	1:0 is no more an option, It should be 1:1

General - Quick Reference

#	Item	Detail/Comment
1	SPRO Path for Master Data Governance	-> Cross-Application Components -> Process and Tools for Enterprise Applications -> Master Data Governance
2	Create Org. and Staffing	TCode - PPOCW