GenieACS-GUI : how to filter "blank" values

[Nicolas Grondin]

Hi,
I'm trying to create new graphs and encounter some troubles.
For example a graph for DSL modulation :

   - ADSL : summary.modulationType = /^ADSL/
   - VDSL : summary.modulationType = /^VDSL/
   - Unknown : ??? don't know how to do that

In SQL i know to do that kind of filter : not like 'ADSL%' and not like
'VDSL%'

Thanks for you help.

Nicolas
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