Installation / Activation of APEX in E-Business Suite R12

See Oracle Support Document 1306563.1 Extending Oracle E-Business Suite Release 12 using Oracle Application Express (APEX) for a white paper and a few scripts to get the integration of Application Express and E-Business Suite R12 working, including a demo application. In short:

• Install Application Express in the Oracle E-Business Suite database. Download the latest version of Application Express from download.oracle.com (Developer Tools) and follow the instructions. 
• Install Oracle REST Data Services (former APEX listener) as Web Listener 
• Preferred by Oracle over Oracle HTTP Server and Embedded PL/SQL Gateway
• Works standalone; Light use: no application server necessary (Web Logic, Glassfish)
• Also see the article Moving to the APEX Listener by Dimitri Gielis 
• Log into Oracle Application Express Administration
• Create Workspace
• Workspace Name: APEX_EBS
• Schema Name: APEX_EBS
• Set security setting ‘Allow Public Upload’ (Manage Instance)
• Apply interoperability patch 12316083

By the way, I didn't do the installation myself. It was done by the dba'ers of the party where the customer has outsourced / hosted it's E-Business Suite application.

Next, build your application in APEX: it’s all about rights !

At my custsomers site they have the next releases / versions:
- Oracle E-Business Suite: release 12.1.3
- Oracle Application Express: release 4.2.4.00.08
- Oracle Database: version 11.2.0.4.0
- Oracle Rest Data Services: version 2.0.7.91.15.01

In the white paper I missed the part how to make the APEX pages more look and feel like EBS pages ...