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ISO standard GPS and dimension tolerances and iso 8015 standard

Hello to you all, I am new to this forum.

I try to find experts for the ISO drawing standard, I hope I am in the right place.

Here are a few questions :

1. First I would like to know, if I put a dimension, let say a diameter of a cylinder with a tol. of 0/-0.2. does it means that the straightness of cylinder must be 0.2 or lower? or must I state the Geometrical relation along side with the tolerance, what does not make real sense.And In which Std. does this roles stated?

2. If I understand the Iso 8015 correctly, It means, if stated in the drawing title block, that the dimension's tol. do not apply for the geometric relation (as in the previous question) , hence the "Principle of independency" apply. If so, I could write diameter tol. of 0/-0.2 and straightness of 1. If what I wrote is correct than how do I measure the dimension of the cylinder?

Please refer to the following drawing:

As shown on drawing, with the ISO 8015 stated:

[IMG]http://www.engineersedge.com/engineering-forum/attachment.php?attachmentid=1974&stc=1[/IMG]

How to measure?, the following drawing shows the measured dimension, is it correct? what "max" dimension will still comply with the upper drawing?

[IMG]http://www.engineersedge.com/engineering-forum/attachment.php?attachmentid=1975&stc=1[/IMG]

I hope I have explained my self clearly ,

Thanks