Interop Framework Page 
The Interop Framework Page consists of only the Content Area iView. In this way it shows only content, without any of the navigation areas. This allows you to embed a specific page or iView inside a 3rd-party portal and also to send direct links to pages and iViews. For more information about copying the URL of an object from the Portal Catalog, see Using the Detailed View.
Location in Portal Catalog: (pcd:portal_content/every_user/general/interop/interop_frameworkpage)
Caution
Do not modify the delta link source object of the above-mentioned framework page, which is located in a subfolder under the Content Provided by SAP folder.
The Interop Framework Page and its associated desktop and rule are provided by default with all new SAP NetWeaver Portal installations. However, if you are upgrading from a previous version, you need to first execute the relevant EPC configuration task to add the relevant rule to the Master Rule Collection.
For more information, see Automated Configuration Tasks.
A rule for displaying content using the Interop Framework Page exists in the Master Rule Collection by default. The rule applies when the portal is accessed with the alias /interop.
For more information about the Master Rule Collection, see Master Rule Collection.