Tapestry IoC has two specific areas where it must put some form of contribution into a specific order:

• Ordered Configurations, where different modules may contribute into a service's configuration
• Service Decorators which must be applied to services from a number of modules.
  In both these cases, objects (either contributions to a configuration, or decorators) are assigning qualified IDs, simple IDs qualified with the containing/contributing module's ID.

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The remainder of the constraint string is a comma-separated list of patterns. The contributed object will be ordered before or after the contributions identified by the patterns.

Constraint Match Patterns

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Match patterns support a very simple kind of wildcard matching. A * (asterisk character) may appear at the start and/or end of the pattern, and it will match zero or more characters there. Thus you can have patterns such as Data* or *Logic or even *User*.

Matching is case insensitive.