I don't recall my specific reasons now but I have been reusing a namespace prefix in schemas and instance data 'mlhim2' to reference different versions of a schema reference model. 

For example:

xmlns:mlhim2="http://www.mlhim.org/xmlns/mlhim2/2_4_1"  in one version of the schema and instance data and then  xmlns:mlhim2="http://www.mlhim.org/xmlns/mlhim2/2_4_2" in another version of the schema and instance data. 

Now I think this is a mistake when I need to have multiple versions of instance data in a single database and run queries across them.  

Should I change to start using:

xmlns:mlhim241="http://www.mlhim.org/xmlns/mlhim2/2_4_1" and xmlns:mlhim242="http://www.mlhim.org/xmlns/mlhim2/2_4_2"

to be more explicit and avoid any problems?

Thanks In Advance,

Tim

--
MLHIM VIP Signup: http://goo.gl/22B0U
============================================
Timothy Cook, MSc           +55 21 94711995
MLHIM http://www.mlhim.org
Like Us on FB: https://www.facebook.com/mlhim2
Circle us on G+: http://goo.gl/44EV5
Google Scholar: http://goo.gl/MMZ1o
LinkedIn Profile:http://www.linkedin.com/in/timothywaynecook