MarkLogic 9 Product Documentationop:from-lexicons
op:from-lexicons( $columnBindings as map:map, $qualifier as xs:string?, [$systemCols as map:map?] ) as map:map
Summary
This function dynamically constructs a view from range indexes or the uri or collection lexicons.
This function will only return rows for documents where the first column has a value.
The keys in the map specify the names of the columns and the values in the map provide
cts:reference objects to specify the lexicon
providing the values of the columns. Optic emits
rows based on co-occurrence of lexicon values within the same document similar to
cts:value-tuples
If the
cts:reference sets the nullable
option to true, the column is optional in the row.
This function creates a row set without a limit. Use op:limit or op:offset-limit to set a limit.
| Parameters | |
|---|---|
| $columnBindings |
An object in which each key is a column name and each value specifies a
cts:reference for a range index or other lexicon (especially the
cts:uri-reference lexicon) with the column values.
|
| $qualifier | Specifies a name for qualifying the column names. By default, lexicon rows have no qualification. Use cases for the qualifier include self joins. Using an empty string removes all qualification from the column names. |
| $systemCols | An optional named fragment id column returned by the op:fragment-id-col function. The fragment id column can be used for joins. |
Example
xquery version "1.0-ml";
import module namespace op="http://marklogic.com/optic"
at "/MarkLogic/optic.xqy";
op:from-lexicons(
map:entry("EmployeeID", cts:element-reference(xs:QName("EmployeeID"))),
"myview",
op:fragment-id-col("Document Fragment"))
=> op:result()