Mulgara

Consider the following query:
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select $type
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    (select $s from &lt;server&gt; where $s &lt;rdf:type&gt; $type and $s &lt;p&gt; &lt;o&gt;)
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from &lt;server&gt;
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where $type &lt;mulgara:is&gt; &lt;test:Class&gt; ;
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Mandating from clauses is regularly redundant, and clutters the query.
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While from is the most common example, I have come across examples for every component of a itql query where they are redundant.  Apart from mandating the keyword 'select', to identify it as a query, we should probably make the rest of the query should be optional.
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