Database Reference
In-Depth Information
rules extracted from Rule DB by RE
on MB/SB side
Event expressions could be of the following types:
• Immediate sequence
• Star sequence
• Conjunction
• Disjunction
• Negate
Some of these expressions were demonstrated in the case 2 sample.
Additional constructs can be derived from the following expressions:
• Any (for the rule
ALL
)
• Relaxed sequence
• Prior operator
The EPL RE semantic will also require the presence of event tables and event histories on
both sides (MB RE and BA); this is crucial for the Trading Partner Business Event's inter-
pretation, and not only for TP recognition. To avoid exponential blow up during ruleset
invocation satisfaction, predicates must be presented for every rule-execution in MB RE.
This can be explained by presenting the rule-parsing tree:
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