Different attributes same value

[Bennett Samowich <brs@ben-tech.com>]

Greetings,

I've come with yet another newbie-ish question.

What is the best way to handle multiple attributes that have the same 
value?  For example one application uses the attribute "homePhone" and 
another uses "telephoneNumber" while another uses "homeTelephoneNumber".

Since we need to work between the various applications what is the best way 
to handle a situation like this (keeping the values in sync)?

Thanks in advance,
- Bennett