DMSDocumentSet:
  ds1:
    Title: Document Set 1
SiteTree:
  s1:
    Title: testPage1
    URLSegment: s1
    DocumentSets: =>DMSDocumentSet.ds1
  s2:
    Title: testPage2
    URLSegment: s2
  s3:
    Title: testPage3
    URLSegment: s3