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Mike Bayer committed 97b2a45

fixed hyperlink to adv datamapping

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doc/build/content/tutorial.txt

     
 With the identity map, a single `Session` can be relied upon to keep all loaded instances straight.
 
-As far as the issue of the same object being modified in two different Sessions, that's an issue of concurrency detection; SQLAlchemy does some basic concurrency checks when saving objects, with the option for a stronger check using version ids.  See [adv_datamapping](rel:adv_datamapping) for more details.
+As far as the issue of the same object being modified in two different Sessions, that's an issue of concurrency detection; SQLAlchemy does some basic concurrency checks when saving objects, with the option for a stronger check using version ids.  See [advdatamapping_arguments](rel:advdatamapping_arguments) for more details.
 
 ### Saving {@name=saving}