The Choose Queries Pane

The Choose Queries pane at the  PAL Queries Tab allows you to display, verify, evaluate, view, and create queries.

Queries Buttons

The Queries Buttons in the upper right of the Choose Queries Pane at the PAL Queries Tab allow you to tag and untag queries for verification, display queries at the Queries Tab, and create, view, and delete queries.

	Tag All: Tags all displayed queries for verification or evaluation. Tagged queries are shown with a check in the Evaluate? column to the left of the query.
	Untag All: Untags all displayed queries for verification or evaluation. Untagged queries are shown with a blank box in the Evaluate? column to the left of the query.
	Display All: Displays all queries currently in the knowledge base at the PAL Queries Tab
	View Query: Opens the PAL Expression Editor in a separate window, and allows you to view the selected query.
	Create Query: Creates a new query and opens the PAL Expression Editor in a separate window. Note that, due to a known bug, the PAL Expression Editor has limited support for creating your queries.
	Add Query to List: Opens the Select Instances dialog and allows you choose the querie(s) you wish to have displayed at the Queries Tab.
	Remove Query From List: Removes the selected querie(s) from the list of queries visible at the Queries Tab. The querie(s) remain in the knowledge base and are still displayed at the Instances Tab. They can also be added back to the list at the Queries Tab later.  It is best to click the query you wish to remove from the list immediately before you remove it.
	Delete Query: Removes selected querie(s) from knowledge base completely. Removed queries cannot be viewed elsewhere or recovered. It may be safest to delete queries from the Instances Tab, where you can see which queries are highlighted.

Query Columns

The query columns give information about the displayed queries.

Evaluate?

Indicates which queries are tagged for verification or evaluation. Tagged queries are indicated with a check . You can tag or untag a query by clicking anywhere in the Evaluate area to the left of the query. You can also tag and untag all queries using the Tag All and Untag All buttons.

Status

Indicates the result of verification or evaluation:

• After the button Warn about indicated queries has been clicked, a green check in the Status column indicates that the query is syntactically correct. A red warning sign indicates that there are syntactic warnings or errors. Selecting a query that has a red warning sign will drive the Warning and Error pane to display the warning information.
• After the button Evaluate indicated queries has been clicked, plusses in the Status column indicate there are instance that meet the query. A red warning sign indicates that there are no instances which satisfy the query. Selecting a query that has plusses will drive the Query Response pane to display the instances found. Note that if the query has a limit on number of instances (for example, three-articles-not-written-by-person), only the first three instances encountered by the Query engine will be displayed.

Query

Gives the name of the query. You can select a query by clicking in this column; however, selected queries are not highlighted.

Warn/Evaluate Buttons

The buttons at the bottom of the Choose Queries pane allow you to validate query syntax and evaluate whether there are any instances in the knowledge base that violate the tagged queries.

• Warn about indicated queries validates the syntax of all tagged queries. The result is indicated in the Status column.  
• Evaluate indicated queries evaluates whether any instances in the knowledge base satisfy the tagged queries.  The result is indicated in the Status column. 

PAL Queries User Interface/The Choose Queries Pane

Next: The Query Attachment Pane

PAL Table of Contents