dawidwys commented on a change in pull request #6268: [FLINK-9576] Fixed
documentation for contiguity within looping pattern.
URL: https://github.com/apache/flink/pull/6268#discussion_r208154095
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File path: docs/dev/libs/cep.md
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@@ -919,6 +774,164 @@ next.within(Time.seconds(10))
</div>
</div>
+#### Contiguity within looping patterns
+
+You can apply the same contiguity condition as discussed in the previous
[section](#combining-patterns) within a looping pattern.
+The contiguity will be applied between elements accepted into such a pattern.
+To illustrate the above with an example, a pattern sequence `"a b+ c"` (`"a"`
followed by one or more `"b"`'s followed by a `"c"`) with
+input `"a", "b1", "d1", "b2", "d2", "b3" "c"` will have the following results:
+
+ 1. **Strict Contiguity**: `{a b3}` -- the `"d1"` after `"b1"` causes `"b1"`
to be discarded, the same happens for `"b2"` because of `"d2"`.
+
+ 2. **Relaxed Contiguity**: `{a b1 c}`, `{a b1 b2 c}`, `{a b1 b2 b3 c}` --
`"d"`'s are ignored.
+
+ 3. **Non-Deterministic Relaxed Contiguity**: `{a b1 c}`, `{a b1 b2 c}`, `{a
b1 b3 c}`, `{a b1 b2 b3 c}` - notice the `{a b1 b3 c}`, which is the result of
Review comment:
Actually I've updated this pattern with different contiguity between `a` and
`b+` cause otherwise the example for strict contiguity was wrong.
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