The ResourceIndex manages relationships between Fedora objects. It is very powerful, but the query syntax can be tricky.
Sample RIsearch queries
Select objects, modification dates, and titles. Start with the 50th Fedora object, and get the next 25 objects:
| No Format |
|---|
select $object $modified $title $type from <#ri> where $object <rdf:type> $type and $object <rdf:type> <fedora-model:FedoraObject> and $object <fedora-view:lastModifiedDate> $modified and $object <dc:title> $title order by $title $object limit 25 offset 50 |
Count all objects that are members of the collection object iudl:10:
| No Format |
|---|
select count(
select $object
from <#ri>
where $object
<info:fedora/fedora-system:def/relations-external#isMemberOfCollection>
<info:fedora/iudl:10>
)
from <#ri>
where $a $b $c
|
Get all collection objects:
| No Format |
|---|
select $object
from <#ri>
where $object
<fedora-model:hasModel>
<info:fedora/cmodel:collection>
|
Get the status of the OVERVIEW datastream:
| No Format |
|---|
select $state
from <#ri>
where <info:fedora/iudl:99732/OVERVIEW>
<fedora-model:state>
$state
|
Find all inactive items:
| No Format |
|---|
select $object
from <#ri>
where $object
<fedora-model:state>
<info:fedora/fedora-system:def/model#Inactive>
|
Find the OwnerID for an item:
| No Format |
|---|
select $ownerId
from <#ri>
where <info:fedora/iudl:200332>
<info:fedora/fedora-system:def/model#ownerId>
$ownerId
|
Count all non-deleted items in a collection:
| No Format |
|---|
select count(select $object
from <#ri>
where $object
<info:fedora/fedora-system:def/relations-external#isMemberOfCollection>
<info:fedora/iudl:10>
minus $object
<fedora-model:state>
<info:fedora/fedora-system:def/model#Deleted>)
from <#ri>
where $a $b $c
|
Find all Service Deployments
| No Format |
|---|
select $object from <#ri> where $object <fedora-model:hasModel> <info:fedora/fedora-system:ServiceDeployment-3.0> |
Find all Service Deployments for a given content model (in this case, the cmodel:image content model):
| No Format |
|---|
select $object from <#ri> where $object <fedora-model:isContractorOf> <info:fedora/cmodel:image> |
Find all deleted object:
| No Format |
|---|
select $object from <#ri> where $object <fedora-model:state> <info:fedora/fedora-system:def/model#Deleted> |
Find all collections that have an item exposed through OAI PMH: (NOTE: be sure to check "Force Distinct")
| No Format |
|---|
select $collectionPid from <#ri> where $item <http://www.openarchives.org/OAI/2.0/itemID> $itemID and $item <info:fedora/fedora-system:def/relations-external#isMemberOfCollection> $collectionPid |
Find all image-derivative items in the slocum collection that aren't described by another object nor contain description themselves
| No Format |
|---|
select $image from <#ri> where $image <fedora-model:hasModel> <info:fedora/cmodel:image-derivatives> and $image <info:fedora/fedora-system:def/relations-external#isMemberOfCollection> <info:fedora/iudl:14> minus $image <info:fedora/fedora-system:def/relations-external#hasMetadata> $description minus $image <fedora-model:hasModel> <info:fedora/cmodel:item-metadata> |
Find all service definitions that aren't registered with a "hasService" relationship to another object.
| No Format |
|---|
select $object from <#ri> where $object <fedora-model:hasModel> <info:fedora/fedora-system:ServiceDefinition-3.0> minus $object2 <fedora-model:hasService> $object |
Encoding queries as URLs
All RI queries must be URL-encoded (with a tool like this one) before being added to a behavior mechanism. To manually encode a query, make the following substitutions:
Original | Replaced |
|---|---|
# | %23 |
$ | %24 |
( | %28 |
) | %29 |
/ | %2F |
: | %3A |
< | %3C |
> | %3E |
[space] | + |
Do not encode the parentheses around any parameters that you want Fedora to pass in. The encoded query should be placed after a suitable base URL like
| No Format |
|---|
http://fedora.dlib.indiana.edu/fedora/risearch?type=tuples&lang=itql&format=Sparql&query= |
If no datastream parameters are being passed, remember to include a "nullbind" parameter (see Behavior Mechanisms for more detail on this). Here is a completed query that searches for the pages of a given object (linebreaks added for readability):
| No Format |
|---|
http://fedora.dlib.indiana.edu/fedora/risearch?type=tuples&lang=itql&format=Sparql&query=select+%24page+ %24sequence+from+%3C%23ri%3E+where+%24page+%3Cinfo%3Afedora%2Ffedora-system%3Adef%2Frelations-external%23 isPartOf%3E+%3C(objuri)%3E+and+%24page+%3Chttp%3A%2F%2Fdlib.indiana.edu%2Flib%2Fxml%2Finfrastructure%2F rdfRelations%23sequenceNumber%3E+%24sequence&dummy=(NULLBIND) |