Data Flow Diagrams - Difference between Lines and Arrows

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Published on 2012-09-22T23:30:39Z Indexed on 2012/09/23 15:49 UTC
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I'm currently working with Visio to create Data Flow Diagrams for a System Analysis and Design class but I'm unsure what the difference between ------ and ------> is. I can connect 2 shapes together with a line (process, entity, data store) but does the single line connecting the two mean data flow? Do I need to explicitly use the data flow arrow to show which way data is flowing?

(There doesn't seem to be tags for this topic, maybe im in the wrong place?)

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