There are two key things you need to know about a historized point:
whether it was logged COV vs sampled on an interval basis
some meter data is collected on an ongoing totalized basis
It is really important to know this information so that you can correctly interpolate and chart the data. So I would like to standardize the tags for this behavior.
Today in SkySpark we use the following tags to capture this:
hisInterpolate with a string value of "cov" or "linear"
hisTotalized: marker tag
Does everybody like using this tags for these purposes or is there some alternative proposal?
Paul QuinnWed 17 Oct 2012
Do you need two separate tags or can this all be handled under the one "hisInterpolate" tag? Are the three behaviors mutually exclusive? If they are, you could just have "hisInterpolate" with string values of "cov" or "linear" or "totalized". This seems cleaner than a separate tag for the totalized behavior.
Brian FrankWed 17 Oct 2012
If they are, you could just have "hisInterpolate" with string values of "cov" or "linear" or "totalized".
It is definitely a step towards a more elegant approach. But is interpolation behavior really the same thing as totalized versus delta logging? They sort of seem like orthogonal concepts (at least they are treated quite different in SkySpark). Or maybe we just need to come up with a different tag name than hisInterpolate.
Brian Frank Tue 16 Oct 2012
There are two key things you need to know about a historized point:
It is really important to know this information so that you can correctly interpolate and chart the data. So I would like to standardize the tags for this behavior.
Today in SkySpark we use the following tags to capture this:
hisInterpolatewith a string value of "cov" or "linear"hisTotalized: marker tagDoes everybody like using this tags for these purposes or is there some alternative proposal?
Paul Quinn Wed 17 Oct 2012
Do you need two separate tags or can this all be handled under the one "hisInterpolate" tag? Are the three behaviors mutually exclusive? If they are, you could just have "hisInterpolate" with string values of "cov" or "linear" or "totalized". This seems cleaner than a separate tag for the totalized behavior.
Brian Frank Wed 17 Oct 2012
It is definitely a step towards a more elegant approach. But is interpolation behavior really the same thing as totalized versus delta logging? They sort of seem like orthogonal concepts (at least they are treated quite different in SkySpark). Or maybe we just need to come up with a different tag name than
hisInterpolate.