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4 changes: 2 additions & 2 deletions ssn/chapters/ModelPropertyDefinition.html
Original file line number Diff line number Diff line change
Expand Up @@ -36,7 +36,7 @@ <h4>New property definitions</h4>
<pre class="example turtle" data-include="./rdf/examples/Temperature-i-adopt.ttl" data-include-format="text"></pre>
<p>
The key point is that an individual property, whether taken from a catalogue or defined using a specialist
vocabaulary, is denoted by a URI.
vocabulary, is denoted by a URI.
This URI can then be used as the value of the
<a>sosa:actsOnProperty</a> or
<a>sosa:observedProperty</a> of an Execution.
Expand All @@ -47,7 +47,7 @@ <h4>Feature-specific properties</h4>
features of interest (e.g., `ex:Temperature`, `ex:Concentration`, or `ex:OnOffStatus`).
These <em>shared</em> properties are then used across executions. For instance, thousands of observations about CO<sub>2</sub> concentrations
all share the same `ex:Concentration` property, thereby ensuring scalability, indexing, interoperability, reuse,
and a concise semantics. Similarly, one could define `ex:CO2Concentration` as a sub-property of
and a concise semantics. Similarly, one could define `ex:CO2Concentration` as a subproperty of
`ex:Concentration` using a single axiom. This new property (and resulting hierarchy) can then be used to distinguish
CO<sub>2</sub> concentration observations from more general concentration observations without giving up on their commonality
with other types of concentration observations. This improves structure and retrieval. The catalogs listed above support this usage.
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