hi, to be honest, i did not had such discussions beforehand, i was testing a simple program to format existing 'height' tags of surveillance cameras into a normalized float(wich is the widely used format); 
the code had such behavior :
'5m' ->'5' 
 '4,3'->'4.3'
'6 - 7m'->'6.5'
  
`
 h = h.replace(' ','')  
 h = h.replace(',','.')
 h = h.replace('m','')
 h = h.replace('M','')

the nodes in question were not accessible from api06.dev.openstreetmap, so I ran a test here without really looking the guidelines for this kind of action. I apologize for that and am willing to undo the changes I made if necessary. 
