The two cases where an integration procedure should be used as a data source for FlexCards and OmniScripts are: To retrieve multiple data sources in a single response and To separate the user interface from changes in the data sources. An integration procedure is a tool that can execute multiple DataRaptor actions, such as Extract, Transform, and Load, and also invoke REST or SOAP services. The consultant can use an integration procedure as a data source for FlexCards and OmniScripts when they need to retrieve data from different sources, such as Salesforce objects or external systems, and store it in a JSON object for display. This way, the integration procedure can provide multiple data sources in a single response, without requiring multiple elements or actions in the FlexCard or OmniScript. The consultant can also use an integration procedure as a data source for FlexCards and OmniScripts when they want to separate the user interface from changes in the data sources. This way, the integration procedure can handle any changes in the data sources without affecting the FlexCard or OmniScript design or configuration.