In 11i/R12 there are many configuration data which ‘er shared across all the OUs. Ex: Payment term. It’s good because you are required to define the data only once but the biggest disadvantage is that there is no method to restrict the access. In fusion application a new concept of data sharing is added, where you define reference data set(s) and determine how the data is shared or partitioned.
Reference data sharing facilitates sharing of configuration data such as jobs and payment terms, across organizational divisions (another new organization concept in FA) or business units. Depending on the requirement (specific or common), each business unit can maintain its data at a central location, using a set of values either specific to it or shared by other business units.
This new feature reduces duplication as well as provides the facility to restrict data as required.
From Oracle Guide

Reference data sets are logical groups of reference data that can be accessed by various transactional entities depending on the business context. Oracle Fusion Applications contains a common reference data set as well as an enterprise set that may be used as a default set. Depending on your business requirement you can create and maintain additional reference data sets, while continuing to use the common reference data set.

Ex: The senior management can decide to use a single AP payment method data set throughout the enterprise & let business unit’s managers define their own payment formats.
Partitioning
The partitioning of reference data and creation of data sets enable you to create reference entities across tables or lookup types, and share modular information and data processing options among business units. With the help of partitioning, you can choose to create separate sets and subsets for each business unit depending upon its business requirement, or create common sets or subsets to enable sharing reference data between several business units, without the need for duplicating the reference data. Partitioning provides you the flexibility to handle the reference data in a way appropriate to your business needs.
The figure illustrates the reference data sharing method (assignment to one set only, with common values) where the user can access the data assigned to a specific set in a particular business unit, as well as access the data assigned to the common set.


In Oracle Fusion Applications, the Enterprise Performance and Planning Business Process Model (BPM) illustrates the major implementation tasks that you perform to create your enterprise structures. This process model includes the Set Up Enterprise Structures detailed business process, which consist of implementation activities that span many product families.
Information Technology is a second BPM which contains the Set Up Information Technology Management detailed business process. Define Reference Data Sharing is one of the activities in this detailed business process and is important in the implementation of the enterprise structures. This activity creates the mechanism to share reference data sets across multiple ledgers, business units, and warehouses, reducing the administrative burden and decreasing the time needed to implement.The important activities of BPM are:
1.1 Define Enterprise
Define the enterprise to capture the name of the deploying enterprise and the location of the headquarters. There is normally a single enterprise organization in a production environment. Multiple enterprises are defined when the system is used to administer multiple customer companies, or when you choose to set up additional enterprises for testing or development.
1.2 Define Enterprise Structures
Define enterprise structures to represent an organization with one or more legal entities under common control. Define internal and external organizations to represent each area of business within the enterprise.
2.1 Define Legal Jurisdictions and Authorities
Define information for governing bodies that operate within a jurisdiction.
2.2 Define Legal Entities
Define legal entities and legal reporting units for business activities handled by the Oracle Fusion Applications.
3.1 Define Business Units
Define business units of an enterprise to allow for flexible implementation, to provide a consistent entity for controlling and reporting on transactions, and to be an anchor for the sharing of sets of reference data across applications.
4.1 Define Financial Reporting Structures
Define financial reporting structures, including organization structures, charts of accounts, organizational hierarchies, calendars, currencies and rates, ledgers, and document sequences which are used in organizing the financial data of a company.
4.2 Define Chart of Accounts
Define chart of accounts including hierarchies and values to enable tracking of financial transactions and reporting at legal entity, cost center, account, and other segment levels.
Define Ledgers Define the primary accounting ledger and any secondary ledgers that provide an alternative accounting representation of the financial data.
4.3 Define Accounting Configurations
Define the accounting configuration that serves as a framework for how financial records are maintained for an organization.
5.1 Define Facilities
Define inventory, item, and cost organizations. Inventory organizations represent facilities that manufacture or store items. The item master organization holds a single definition of items that can be shared across many inventory organizations. Cost organizations group inventory organizations within a legal entity to establish the cost accounting policies.
5.2 Define Reference Data Sharing
Define how reference data in the applications is partitioned and shared.
As the name suggests it’s a fusion application from oracle which encloses the best feaures of the following oracle products :

•Oracle EBS
•Peoplesot
•JD Edwards
•Sybel CRM
And many more
OAF is designed from the ground-up using the latest technology advances, Oracle Fusion Applications are 100 percent open-standards-based business applications .
Like Other oracle products (Oracle EBS R12), OFA is also modular and is coming up with below applications :

  • Supply Chain Management
  • Procurement
  • Financials
  • Project Portfolio Management
  • Human Capital Management
  • Customer Relationship Management
  • Governance, Risk, and Compliance

For customers using Oracle E-Business Suite and Oracle’s PeopleSoft, JD Edwards, and Siebel CRM that are interested in better business performance, Oracle provides a complete choice in deployment options.

If there is some oracle Aplication Instance say (11.5.10) got upgrade to R12. After upgarding the Instance/Application, If I want to know the older version. Then use the following select statement.

SELECT SUBSTR(snapshot_name,12,8)
FROM ad_snapshots
WHERE comments = ‘Preseeded’
AND REPLACE(SUBSTR(snapshot_name,12,8),’.’) =
(
SELECT max(to_number(replace(SUBSTR(snapshot_name,12,8),’.’)))
FROM ad_snapshots
WHERE comments = ‘Preseeded’
);

Use the following to know the current Oracle Apps Version.
———————————————————————

SELECT release_name FROM fnd_product_groups;

In Release 12, Oracle E-Business Tax, a new product, will manage transaction tax across
the E-Business Suite. In prior releases, the setup, defaulting and calculation of
transaction tax for Payables was managed within Payables using tax codes, their
associated rates and a hierarchy of defaulting options. This method of managing tax is
still available to you in Release 12. During the upgrade, E-Business Tax migrates the tax
codes and their rates to corresponding tax rules so that your tax processing can get the
same results after the upgrade as it did before. If you choose to use the features of
E-Business Tax, you can make the transition at your own pace, incrementally adding
E-Business Tax rules to meet your requirements.

In Release 12, there are new fields added to the supplier, invoice, and related entities
that track tax attributes used by E-Business Tax. Many of these attributes were
implemented with Global Descriptive Flexfields in prior releases and are upgraded to
regular fields on these entities.

Also during the upgrade, E-Business Tax takes information from the AP invoice lines
and creates summary and detail tax lines in the E-Business Tax repository. The tax lines
are upgraded based on the time period you specify during the submission of the
upgrade. During the upgrade, Payables creates payment distributions and prepayment
application distributions for existing transactions and creates links between these new
distributions and the original invoice distributions. After the upgrade, if you adjust a
historical transaction that was not upgraded, E-Business Tax automatically upgrades
the transaction to the Release 12 entities.

Tax Attributes Controlled by Global Descriptive Flexfields Migrated to Core Payables and E-Business Tax Entities

The following tax attributes were implemented using descriptive flexfields on the
invoice entities in Release 11i and are now implemented using named columns. The
Invoice Lines upgrade will upgrade the values from the descriptive flexfields segments
to the new columns.

The following are new fields on the invoice header and in the invoice interface:
• Business Category
• Fiscal Classification
• Invoice Sub-type
• Port of Entry
• Supplier Exchange Rate
• Supplier Tax Invoice Date
• Supplier Tax Invoice Number
• Tax Date
• Tax Reference Number

The following are new fields on the invoice line and in the invoice lines interface:

• Assessable Value
• Business Category
• Deferred Option, Distribution Account
• Fiscal Classification
• Intended Use
• Product Category
• Ship-To Location
• Supplier Exchange Rate
• User Defined Fiscal Classification

The following are new fields on the invoice distribution:

• Fiscal Classification
• Distribution Account
• Intended Use