January 2017 |
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EMAIL INTERVIEW – Therese Sullivan and Ken Sinclair
Therese Sullivan, Principal, BuildingContext
Ltd
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Sullivan:
Brick Schema is another open
source organization launched around metadata tagging for buildings.
Automatedbuildings readers have been learning about and, in some cases,
deploying Haystack tagging for over five years, so the easiest way to
define Brick Schema is in terms of Project Haystack. In fact, that is
what the Brick Schema
developers do themselves. The Brick academic researchers presented
their work in mid-November at a conference on the Stanford campus called BuildSys 2016. According to the paper introducing the demonstration
project:
Sinclair:
This is great stuff I think we all
have discovered what open is all about. You do not need to ask to
build on someone else’s great open work. People working with open to
create "open-er."
Sullivan:
I don’t think anyone asked permission. But, I hope the two
organizations will work together toward the goal. All the brain power
behind this Brick Schema launch validates that tagging and taxonomy are
the right problems to be working on. Project Haystack has the lead on
that. And open means open, so "Haystackers" can now copy any concepts
in
Brick Schema that they like. It is quite a compliment to Project
Haystack that all these PhD-types from top universities in California,
Carnegie Mellon University, IBM Ireland, etc. studied the landscape and
decided to build on the Project Haystack metadata open source effort.
It’s an acknowledgment that Project
Haystack Methodology is the best technology out there. The Brick
research papers say as much. Their charts also draw comparisons to
BIM-related hierarchies, but the Brick graph draws directly from
Haystack. BACnet has considered standardizing a metadata schema as
well. ASHRAE Addendum 135-2012ba provides a way to add metadata
to BACnet devices, but this too includes a provision that allows BACnet
to access Haystack Tagging.
Now, the open-source Brick Schema organization will add its heavy data
science expertise with the same goal of an open metadata schema for
buildings. I think that is how open source works? They’ll want to
engage even more commissioning experts, master systems integrators, and
other building data wrangler-types. Domain knowledge is vital.
University data science untethered to experience is not a formula for
success. As you say ‘Our Assets are People, not Technology.’ The
greatest accomplishment of Project Haystack is its community. Some real
innovators in the BAS industry have joined, but many are holding back.
Haystack plus Brick Schema would be the start of an awesome community
enlargement, I think.
Sinclair:
What do you see as the main point
of comparison between Brick and Haystack?
Sullivan:
Like Haystack, Brick Schema starts with a ‘graph’ of building entities.
The simple meaning of ‘graph’ in this
context is having agreed-upon
names for things in a domain set, and then creating a visual map of
those things by defining their relationship for a specific instance,
for example, equipment in a building.
To get on the same page as the data scientists about the word
‘graph’—think about Facebook, LinkedinIn, Twitter and their social
graphs. In the article that I co-authored with Alper Uzmezler in
September, we talked about how Machine Learning would enter Smart
Buildings. Data structuring for machine learning happens according to a
graph. If you have a winning graph, you may be able to build a
Reciprocal Data Application (RDA) around it. This is an app that is so
attractive and useful that it gets knowledgeable people to willingly
contribute their efforts to the creation of training data to feed
machine-learning.
[an error occurred while processing this directive]Sinclair:
So, they both have a graph. How has
the Brick Schema team diverged from Haystack and added value?
Sullivan:
The Brick Schema team has added its ontology or hierarchical way of
ordering and defining relationships among the agreed-upon names. They
have described this further in their paper.
It has been used in 6
buildings, mainly university campus buildings. Looking over the
BuildingSys presentation on Brick Schema, they would have done well to
ask Project
Haystack about their reference implementations. They say Haystack has
zero implementations. Of course, Haystack deployments are happening
wherever supporting members have been doing projects. There are
millions of points out there in real working buildings under
Haystack-enabled building management. I’ve curated a collection of
tweets that sample just some of the largest and most well-known
building energy-efficiency projects that incorporate Haystack tagging
here.
Sinclair:
Brick Schema seems to have a heavy
California flavor with all the UCs involved? Is there a reason for that?
Sullivan:
California has enacted the SB 350 Golden State Standards around
renewable energy and energy-efficiency—among the most ambitious climate
action legislation in the world. So, yes, the UC’s are expected to help
lead. The launch of Brick Schema at Stanford in Silicon Valley is no
coincidence either. All the big IT and OT companies are either based or
have representation in the Valley, and many are heavily vested in IoT
innovation. They are all coming around to understanding that a unified
metadata schema for buildings is in their path. The challenge is bigger
than our BAS industry. That’s clear.
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