Joy,
There are many differences / architecture changes between the WAAE 4.x, WAAE 11.0, and WAAE 11.3 / 11.3.5 / 11.3.6 releases.
One of the larger differences between WAAE 4.x / WAAE 11.0 and WAAE 11.3.x is the use of the System Agent vs. the older Remote Agent.
The WAAE 11.3 Release Notes chapter 6 is titled "New Features" and contains the the following:
Chapter 6: New Features
New Product Name (see page 33)
New Agents (see page 34)
New Job Types (see page 37)
Support for Virtual Resources (see page 40)
New Machine Type (see page 40)
Cross-Instance Job Dependencies with CA Workload Automation EE (see page 41)
Must Start Times and Must Complete Times (see page 41)
Manual Intervention for i5/OS Job Types and the New REPLY_RESPONSE Event (see page 42)
New as_test Command (see page 42)
New forecast Command (see page 42)
New archive_jobs Command (see page 43)
New autoprofm Command (see page 43)
New Scheduler Startup Settings on UNIX (see page 43)
Monitoring a Condition Continuously and the New ALERT Event (see page 44)
Logging a Job's State Changes and the New STATE_CHANGE Event (see page 44)
Improved Log Maintenance (see page 45)
Specifying the localhost (see page 45)
Appending Event Message Text in Scheduler Log File (see page 46)
Specifying an Instance-Wide Encryption Key (see page 46)
Polling for Resource Availability (see page 46)
New reindex.pl Script for Rebuilding Database Table Indexes (see page 47)
The WAAE 11.3 Release Notes chapter 7 is titled "Changes to Existing Features" and contains the the following:
Chapter 7: Changes to Existing Features
Legacy Agent Replaced by CA Workload Automation Agent (see page 49)
Differences Between the Legacy Agent and the New Agent (see page 49)
Encryption and FIPS 140-2 Compliance (see page 56)
Pound Sign (#) Allowed in Object Names (see page 56)
Command Substitutions Not Allowed in the watch_file Attribute (see page 57)
Removed Commands (see page 57)
Scheduler Startup Options Removed from the eventor Command (see page 58)
Job Profiles Manager and autosysreport.exe Integrated with the Administrator Utility (see page 58)
Changes to Cross-Instance Job Dependencies (see page 58)
Updated autoping Command (see page 59)
Updated clean_files Command (see page 59)
IPv6 Support (see page 59)
Change in as_owner Policy Validation (see page 59)
KILLJOB and SEND_SIGNAL Behavior (see page 60)
These chapters would be a good starting point.
Regards,
John McCarthy
Senior Support Engineer
CA Technologies