You are viewing a plain text version of this content. The canonical link for it is here.

Posted to commits@daffodil.apache.org by "Steve Lawrence (Jira)" <ji...@apache.org> on 2021/02/04 20:27:00 UTC

[jira] [Updated] (DAFFODIL-2013) Predicate required for when accessing optional elements in expression

     [ https://issues.apache.org/jira/browse/DAFFODIL-2013?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Lawrence updated DAFFODIL-2013:
-------------------------------------
    Priority: Minor  (was: Major)

> Predicate required for when accessing optional elements in expression
> ---------------------------------------------------------------------
>
>                 Key: DAFFODIL-2013
>                 URL: https://issues.apache.org/jira/browse/DAFFODIL-2013
>             Project: Daffodil
>          Issue Type: Bug
>          Components: Front End
>    Affects Versions: 2.2.0
>            Reporter: Steve Lawrence
>            Priority: Minor
>
> Behind the scenes we treat optional elements (e.g. minOccurs="1" dfdl:lengthKind="implicit"), as arrays that should just always have either zero or one elements. This means that when an expression attempts to access this element, a predicate of [1] is required. Otherwise you get an error about "Query-style paths not supported". We should have logic to treat optional elements special so that the predicate is not mandatory.



--
This message was sent by Atlassian Jira
(v8.3.4#803005)