No - there is no industry standard that specifies that the most recent standard is to be used. Most correctly ~ the specific GD&T standard should be identified. To be fair... I doubt there will be a an interpretation issue based on the description of your engineering drawings.For our drawings, we call out in our notes that we follow ASME Y14.5 (no specific version, I've been told it assumes "the latest version"). that, or if I am incorrect, please let me know what I'm missing? If you need additional information, please let me know. Thanks!
First, there is no para. 2.7.4 in the ASME Y14.5M-1994 standard... This is why we specify which standard...I believe he wants to use the datums to establish an orientation relationship between the features, like in 2.7.4.
In ASME Y14.5-2009 para. 2.7.4 clearly identifies that there is no relationship control given by the limits of size and that features shown to be perpendicular, coaxial, or symmetrical to each other MUST be toleranced for location or orientation to avoid incomplete drawing requirements.
I feel that, without feature control frames, or some additional note describing what our purpose is, the datums alone do not do anything.
This is absolutely true.. There are no assumptions of relationships allowed. Specifying a datum feature does not automatically make the feature a reference zero or datum for other features. The specific relationship must be defined by appropriate methods.