PrF UG queries chain queries - Revision history

RichMorin at 01:39, November 14, 2008

2008-11-14T01:39:01Z

RichMorin at 22:32, October 29, 2008

2008-10-29T22:32:20Z

RichMorin at 19:41, October 29, 2008

2008-10-29T19:41:02Z

RichMorin at 20:11, October 25, 2008

2008-10-25T20:11:36Z

RichMorin at 18:56, October 17, 2008

2008-10-17T18:56:19Z

RichMorin at 21:45, October 16, 2008

2008-10-16T21:45:29Z

RichMorin at 21:44, October 16, 2008

2008-10-16T21:44:35Z

RichMorin: Automated import of articles

2008-10-09T09:08:20Z

Automated import of articles

New page

__NOTOC__
== Chaining Multiple Queries ==

{{PrF_UG_TOC_queries}}<div id='prf_ug'>

Queries saved in the Query Library can be used as matching values for slots of type Instance.
When you do this,
the resulting query looks for instances where the slot value is a search result for the specified query.

Often,
when you need to create a query of this type,
you will look at a class that has a slot of type Instance and want to know which of those instances have a certain property.
When you create the combined query,
you need to create the query for the property first,
and then create the query for the class.

For example,
the query "Articles whose Authors are highly paid" looks for instances of the Class Article whose value at the slot author is also a valid result of the query "People with salary greater than 100,000".

<div>[[Image:PrF_UG_queries_people_highly_paid.png|queries_people_highly_paid]]</div>

Query:
People with salary greater than 100,000

<div>[[Image:PrF_UG_queries_articles_whose_authors.png|queries_articles_whose_authors]]</div>

Query using "People with salary greater than 100,000"

You do not have to use a slot in either query.
If you just use a class,
you will find all instances of that class and its subclasses.

To create a query of this type,
you need to make sure the two queries satisfy the following:

<ul class='a'>
<li>
The slot value for Query B,
the query that contains another query,
must be one of the following:


<ul>
<li>
a slot of type Instance


<li>
empty (in this case,
you must select a class)

</ul>

<li>
For the final chained query to be meaningful,
Query A (the query that will be used inside the other query) must have results that intersect the possible inputs for Query B.
If Query A has a slot,
the domain for the slot should intersect the Allowed Classes for the slot of type Instance in Query B.
If Query A does not have a slot,
the subclasses of the class in Query should intersect the subclasses of the Allowed Classes for the slot of type Instance in Query B.

</ul>

To create a query of this type

<ol class='a'>
<li>
[[PrF_UG_queries_create_query|Create]]
an initial query.


<li>
[[PrF_UG_queries_saving_query|Save]]
this query in the
[[PrF_UG_queries_query_library|Query Library]].


<li>
Clear the current query.


<li>
Select the Class and/or Slot you want for the second query.


<li>
Select contains or does not contain from the menu.


<li>
Click the Add Query
[[Image:PrF_UG_queries_query.gif|queries_query]]
button.


 Note: You may have some trouble getting this to display.
If you do,
try switching to another tab and then returning to the Queries Tab.
If that doesn't work,
try retrieving the "Articles whose authors are highly paid" query from the Query Library,
then clearing it and recreating your query.
You may still have to switch to another tab after you have entered your slot,
but this should work.


<li>
A Pick Query dialog displays the saved queries.

 <div>[[Image:PrF_UG_queries_pick_query.png|queries_pick_query]]</div>


<li>
Select the query you want and click okay.

</ol>

You can also
[[PrF_UG_queries_create_complex_query|combine]]
chained queries with other queries.

</div>

@@ Line 2: / Line 2: @@
 == Chaining Multiple Queries ==
-{{PrF_UG_TOC_queries}}<div id='prf_ug'>
+<noinclude>{{PrF_UG_TOC_queries}}<div id='prf_ug'></noinclude>
 Queries saved in the Query Library can be used as matching values
@@ Line 116: / Line 116: @@
-</div>
+<noinclude></div></noinclude>

@@ Line 108: / Line 108: @@
    <li><p>
-     Select the query you want and click okay.
+     Select the query you want and click OK.
      </p>
 </ol>

@@ Line 20: / Line 20: @@
 is also a valid result of the query "People with salary greater than 100,000".
-<div>[[Image:PrF_UG_queries_people_highly_paid.png|
+<div>[[Image:PrF_UG_queries_people_highly_paid.png|frame|none|
-        queries_people_highly_paid]]</div>
+        People with salary greater than 100,000]]</div>
 <div>[[Image:PrF_UG_queries_articles_whose_authors.png|thumb|none|600px|
-        queries_articles_whose_authors]]</div>
+        Articles whose Authors are highly paid]]</div>
 You do not have to use a slot in either query.
@@ Line 93: / Line 89: @@
    <li><p>
      Click the <b>Add Query</b>
-     [[Image:PrF_UG_queries_query.gif|queries_query]] button.
+     ([[Image:PrF_UG_queries_query.gif|queries_query]]) button.
      </p>
      <p>
@@ Line 108: / Line 104: @@
      A <b>Pick Query</b> dialog displays the saved queries.
      </p>
-     <div>[[Image:PrF_UG_queries_pick_query.png|queries_pick_query]]</div>
+     <div>[[Image:PrF_UG_queries_pick_query.png|frame|none|
    <li><p>
@@ Line 117: / Line 114: @@
 You can also [[PrF_UG_queries_create_complex_query|combine]] chained queries
 with other queries.
 </div>

@@ Line 26: / Line 26: @@
 People with salary greater than 100,000</i></b>
-<div>[[Image:PrF_UG_queries_articles_whose_authors.png|
+<div>[[Image:PrF_UG_queries_articles_whose_authors.png|thumb|none|600px|
         queries_articles_whose_authors]]</div>

@@ Line 94: / Line 94: @@
      <b>Note:</b>
      You may have some trouble getting this to display.
-     If you do, try switching to another tab and then returning to the Queries Tab.
+     If you do, try switching to another tab and then returning to the Queries tab.
      If that doesn't work, try retrieving the "Articles whose authors are highly paid" query
      from the Query Library, then clearing it and recreating your query.

@@ Line 4: / Line 4: @@
 {{PrF_UG_TOC_queries}}<div id='prf_ug'>
-Queries saved in the Query Library can be used as matching values for slots of type Instance.
+Queries saved in the Query Library can be used as matching values
-When you do this,
+for slots of type Instance.
-the resulting query looks for instances where the slot value is a search result for the specified query.
+When you do this, the resulting query looks for instances
-Often,
+Often, when you need to create a query of this type,
-when you need to create a query of this type,
+you will look at a class that has a slot of type Instance
-you will look at a class that has a slot of type Instance and want to know which of those instances have a certain property.
+and want to know which of those instances have a certain property.
 When you create the combined query,
 you need to create the query for the property first,
 and then create the query for the class.
-For example,
+For example, the query "Articles whose Authors are highly paid"
-the query "Articles whose Authors are highly paid" looks for instances of the Class <b>Article</b> whose value at the slot <i>author</i> is also a valid result of the query "People with salary greater than 100,000".
+looks for instances of the Class <b>Article</b> whose value at the slot <i>author</i>
-<div>[[Image:PrF_UG_queries_people_highly_paid.png|queries_people_highly_paid]]</div>
+<div>[[Image:PrF_UG_queries_people_highly_paid.png|
 <b><i>Query:
 People with salary greater than 100,000</i></b>
-<div>[[Image:PrF_UG_queries_articles_whose_authors.png|queries_articles_whose_authors]]</div>
+<div>[[Image:PrF_UG_queries_articles_whose_authors.png|
 <b>Query using "<i>People with salary greater than 100,000"</i></b>
@@ Line 47: / Line 51: @@
      <li><p>
-       empty (in this case,
+       empty (in this case, you must select a class)
        </p>
    </ul>
@@ Line 54: / Line 57: @@
    <li><p>
      For the final chained query to be meaningful,
-     Query A (the query that will be used inside the other query) must have results that intersect the possible inputs for Query B.
+     Query A (the query that will be used inside the other query)
-     If Query A has a slot,
+    must have results that intersect the possible inputs for Query B.
-    the domain for the slot should intersect the Allowed Classes for the slot of type Instance in Query B.
+     If Query A has a slot, the domain for the slot
-     If Query A does not have a slot,
+    should intersect the Allowed Classes for the slot of type Instance in Query B.
-    the subclasses of the class in Query should intersect the subclasses of the Allowed Classes for the slot of type Instance in Query B.
+     If Query A does not have a slot, the subclasses of the class in Query
      </p>
 </ul>
@@ Line 66: / Line 71: @@
 <ol class='a'>
    <li><p>
-     [[PrF_UG_queries_create_query|Create]]
+     [[PrF_UG_queries_create_query|Create]] an initial query.
      </p>
    <li><p>
-     [[PrF_UG_queries_saving_query|Save]]
+     [[PrF_UG_queries_saving_query|Save]] this query
-     this query in the
+     in the [[PrF_UG_queries_query_library|Query Library]].
      </p>
@@ Line 90: / Line 93: @@
    <li><p>
      Click the <b>Add Query</b>
-     [[Image:PrF_UG_queries_query.gif|queries_query]]
+     [[Image:PrF_UG_queries_query.gif|queries_query]] button.
      </p>
-     <p> <b>Note:</b> You may have some trouble getting this to display.
+     <p> <b>Note:</b>
-     If you do,
+    You may have some trouble getting this to display.
-    try switching to another tab and then returning to the Queries Tab.
+     If you do, try switching to another tab and then returning to the Queries Tab.
-     If that doesn't work,
+     If that doesn't work, try retrieving the "Articles whose authors are highly paid" query
-    try retrieving the "Articles whose authors are highly paid" query from the Query Library,
+    from the Query Library, then clearing it and recreating your query.
      You may still have to switch to another tab after you have entered your slot,
      but this should work.
@@ Line 106: / Line 107: @@
    <li><p>
      A <b>Pick Query</b> dialog displays the saved queries.
      </p>
    <li><p>
@@ Line 115: / Line 115: @@
 </ol>
-You can also
+You can also [[PrF_UG_queries_create_complex_query|combine]] chained queries
-[[PrF_UG_queries_create_complex_query|combine]]
+with other queries.
 </div>