How to retrieve Work Day Definition (Weekly Working Hours section) using OTBI

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Hello
We need to extract the information: Work Day Definition (Weekly Working Hours section) using OTBI. 
USA are using this information to track Shift information for their employees and we need to be able to report on this info using OTBI.

In Worker / Assignment Hours Details : I was able to find "Assignment Hours Details Identifiers"."Working Hour Pattern Identifier". I get results like 300000057576864,0 (probably unique ID for each Employee having a Work Day Definition). But this is not what we are looking for. We need the label of the value selected in the list of value behing the field "Work Day Definition". Via BI Publisher this is WWH.DESCRIPTION or WWH.WORK_DAY_DEF_CD: