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Minor clarifications - observation collection pattern #496

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Minor clarifications - observation collection pattern
dr-shorthair Aug 30, 2026
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Update ssn/chapters/ModelObservationCollection.html
dr-shorthair Sep 1, 2026
a31b848
Update ssn/chapters/ModelObservationCollection.html
dr-shorthair Sep 1, 2026
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Update ssn/chapters/ModelObservationCollection.html
dr-shorthair Sep 1, 2026
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23 changes: 12 additions & 11 deletions ssn/chapters/ModelObservationCollection.html
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Expand Up @@ -7,23 +7,24 @@ <h3>Homogeneous collection of observations</h3>
</p>
<ul>
<li>
many monitoring processes generate a stream of data in which only the (phenomenon-) time changes between
consecutive results for the same property on a single feature of interest, observed using the same procedure
implemented using the same sensor.
Many monitoring processes generate a stream of data.
Only the (phenomenon-) time changes between consecutive results for the same property on a single feature of
interest.
The property is observed using the same procedure, implemented using the same sensor.
</li>
<li>
a sensor network typically generates a set of results, over the same time interval, for the same
property(s), over a suite of features-of-interest.
Imaging sensors could be considered a special case of this, where the proximate features-of-interest
A sensor network typically generates a set of results, over the same time interval, for the same
property(ies), over a suite of features-of-interest.
Imaging sensors are a special case of this, where the proximate features-of-interest
correspond with individual pixels in the result.
</li>
</ul>

<p>
These patterns can be accommodated with the class `ObservationCollection` individuals of which may
hold one or more of the essential properties of an atomic observation, except for the result.
Where present, the value of the property(s) of the collection are shared by all member observations.
Of the essential properties of an observation, only the value of each actual <a href="https://www.w3.org/TR/vocab-ssn/#SOSAhasResult">hasResult</a> is not potentially shared by all member
These patterns can be accommodated with the class `ObservationCollection`.
The value of the property(ies) of the collection that are present are shared by all member observations.
Of the essential properties of an observation, only the value of each actual
<a href="https://www.w3.org/TR/vocab-ssn/#SOSAhasResult">hasResult</a> is not potentially shared by all member
observations, though at least one of the other properties would be expected to vary between members in a typical
collection.
</p>
Expand All @@ -44,7 +45,7 @@ <h3>Homogeneous collection of observations</h3>

<p>
Collections may be nested.
For example, an outer observation-collection might share the observed-property, procedure and sensor, and
For example, an outer observation-collection might share the observed property, procedure, and sensor, and
contain inner observation-collections at different phenomenon-times, each of which contain a set of observations
on different features-of-interest (<a href="#Fig-observation-collection-1"></a>).
</p>
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