Triply Academy

academyCreated on Sep 12th, 2018
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This query is used in our documentation.

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Schema.org allows us to store the same audio fragment in multiple formats. HTML templating allows us to generate an HTML5 <audio> element that includes multiple <source> tags.

Created 8 months ago, 3 versions

This query shows how HTML literals can be returned by a SPARQL query.

Since the creation of complex HTML literals can be rather cumbersome, the query can be rewritten into this query that uses Triply Templates for simplification.

Created a year ago, 4 versions

Query that shows how Triply Templating can be used to simplify SPARQL queries with complex literals. This is specifically useful for SPARQL queries that return HTML literals, which can be rather complex.

This query is a simplified version of this query that does not use Triply Templating.

Created a year ago, 4 versions

An ASK query returns whether a specific fact is true or false. In this case, the fact is "Mew weights 50 kilograms." This fact is false (the actual weight is 40 kilograms.)

Created a year ago, 7 versions

An ASK queries returns whether a specific fact is true or false. In this case, the fact is "Mew weights 40 kilograms." This fact is true.

Created a year ago, 7 versions
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Trend lines for life expectancy in Rwanda.

Created a year ago, 4 versions

Life expectancy of countries and the worldwide average.

Created a year ago, 10 versions

Displays the life expectancy for countries in Africa in 2017.

Created a year ago, 2 versions

This query is similar to query 3-2-implicit, but uses anonymous node notation in order to omit the ?pokemon subject term variable. By doing so, the meaning of this query is significantly changed, as can be seen by the result set.

How to read the aggregation in this query?

  1. We are dealing with aggregation, because at least one aggregation function (count) appears.
  2. No group by clause appears, so we are dealing with implicit grouping.
  3. Implicit grouping means grouping around the set of variables that are visible and not argument to an aggregation function. In this case, this set of variables is ∅ (the empty set).
  4. Grouping based on the empty set means that all results are part one one big group. So this query counts the number of names in the entire dataset.
Created a year ago, 7 versions

This query is similar to query 3.2, but uses implicit grouping.

Implicit grouping occurs when at least one aggregation function is used (in this case count) and no group by clause is given. In this case, grouping is performed based on the set of visible variables that are not themselves arguments to an aggregation function. In this query, implicit grouping result in grouping around the ?pokemon variable.

Created a year ago, 7 versions

This query is similar to query geosparql-geometry, but uses anonymous node notation (square brackets, [...]) in order to leave out the subject term ?feature that is not used in the projection.

Created a year ago, 2 versions