https://userapps.support.sap.com/sap/support/knowledge/en/1857024
1857024 - This workbook contains links to other data sources | SAP Knowledge Base Article
On opening workbooks via BEx Analyzer 7.X, it shows a pop-up window saying "This workbook contains links to other data sources" and gives options "update"/...
other data sources
https://itd.sandiegounified.org/cms/One.aspx?portalId=27969551&pageId=30710160
Other Data Sources - IT Department
other data sourcesdepartment