pubsub content based filtering

Hello:

I have a requirement to do content-based filtering for broadcast notifications.

XEP ref: 12.19 Content-Based Pubsub Systems

Is this supported?

Is there an alternate mechanism we can use?

My clients will be subscribing to Alerts. But Publisher publishes alerts with various options (for e.g zip).

If My client can subscribe with subscription-option zip, the alerts for other zips can be avoided.