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validate

Validate validates a value against the index on a field.

command=validate&<parameter>=<value>&.

database (String) database on which to perform the validate function. The name of this database must have been specified in the adlibweb.xml file.
field (String) English name of the field in the data dictionary used for validation. Check that the field actually has an index.
value (String) value to validate.
limit (Integer) [optional] maximum amount of keys to return (default = 10).
startfrom (Integer) [optional] first key number to return in the result (default = 1)

With validate you can effectively check whether a value already occurs in the index on a field.

Retrieve the first, maximally 10 keys from the index on the object_name field, starting from 'a' show
The object_name field is linked to the Thesaurus, so the validate command lists the priref (record number) from the linked records referrred to from the index on the object_name field. The TE tag in the XML result contains the retrieved index key. The 'a' value does not exist as an object name, so wwwopac.ashx retrieves the next values from the index, in alphabetical order.
```
http://test2.adlibsoft.com/api/wwwopac.ashx?database=collect.inf&command=validate&field=object_name&value=a
```
run example select text
From key number 10 retrieve the first, maximally 30 keys from the index on the object_name field, starting from 'a' show
- no further description -
```
http://test2.adlibsoft.com/api/wwwopac.ashx?database=collect.inf&command=validate&field=object_name&value=a&limit=30&startfrom=10
```
run example select text
Retrieve the first, maximally ten keys from the index on the administration_name field, starting from 'york' show
The administration_name field is a local field, so the record numbers (prirefs) listed in the XML result refer to object records.
```
http://test2.adlibsoft.com/api/wwwopac.ashx?database=collect.inf&command=validate&field=administration_name&value=york
```
run example select text