The function query can be used to search an object
for a keyword.
The data.set and importer methods perform such a search
through the annotations and value labels of
the items in the data set.
Usage
query(x,pattern,...)
## S3 method for class 'data.set':
query(x,pattern,\dots)
## S3 method for class 'importer':
query(x,pattern,\dots)
## S3 method for class 'item':
query(x,pattern,\dots)
# (Called by the methods above.)
Arguments
x
an object
pattern
a character string that gives the pattern to be searched
for
...
optional arguments such as
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Value
If both the annotation and the value labels of an item match the pattern
the query method for 'item' objects returns a list containing the annotation
and the value labels, otherwise if only the annotation or the value labels
match the pattern, either the annotation or the value labels are returned,
otherwise if neither matches the pattern, query returns NULL.
The methods of query for 'data.set' and 'importer' objects return
a list of all non-NULL query results of all items contained by these
objects, or NULL.