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https://issues.apache.org/jira/browse/UIMA-2937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13681186#comment-13681186
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Peter Klügl commented on UIMA-2937:
-----------------------------------
I do not see a good solution for this problem. The rule is normally forced to
start with the first rule element, but that is optional. If we do not want to
match on it, the rule should not start its match with that rule element. I
added the manual selection of the rule anchoring in UIMA-2975, which can be
used to avoid this problem. There is now also a section in the documentation
describing the problem and the new functionality.
> Leading optional matching conditions in Ruta
> --------------------------------------------
>
> Key: UIMA-2937
> URL: https://issues.apache.org/jira/browse/UIMA-2937
> Project: UIMA
> Issue Type: Bug
> Components: ruta
> Affects Versions: 2.0.1ruta
> Reporter: Peter Klügl
> Assignee: Peter Klügl
> Fix For: 2.0.2ruta
>
>
> Armin Wegner reported:
> In Ruta 2.0.2-SNAPSHOT, rules with an optional first element do not work. The
> optional part seems to be mandatory. Using
> DECLARE Test;
> "a"? "b" "c"{->MARK(Test, 1, 3)};
> on
> a b c x b c
> marks "a b c" (0, 5) but not "b c" (8, 11).
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