Aggregation patterns

The patterns are based on the aggregation-related Common Usage Patterns, as discussed in chapter 2:

• Aggregation of data from multiple sources: This pattern is useful if the results from multiple service invocations need to be combined into a single message.
• Batch processing with message enrichment: This pattern is useful if the message to be processed contains a repeating element, and each element needs to be enhanced separately.
• Batch processing requiring embedded aggregation: This pattern is useful if the scenario is the basic batch processing pattern described in the second pattern, but the enhancement requires information from multiple sources.
• Nested aggregation: This pattern is useful if the scenario is the basic batch processing pattern described in the second pattern, but the repeating elements themselves contain repeating elements.