[Tagging] Multilevel buildings

[Nathan Edgars II]

Is there any standard for mapping tenants in buildings with multiple 
levels? For example:
http://paarcgis.ocpafl.org/Webmap2/PropertyPhoto.aspx?imgUrl=//pawebstor/gisdata/Mobilevideo/282325/282325000000045_1_AW.jpg&pid=282325000000045&address=7219%20INTERNATIONAL%20DR&w=600&h=450
Would I use two nodes in the same place for Everything $1.99 and 24 Hr 
Dentist, with level=1 and level=2 respectively?