AllegroGraph 6.1.5 HTTP Reference

Returns a set of catalogs that are available on this server. For each catalog, id and uri properties are returned, giving respectively the name of the catalog and the URL under which it is found. Properties named readable and writable indicate, for each catalog, whether the current user has read or write access to at least one repository in it.

If dynamic catalogs are enabled for the server (see the DynamicCatalogs directive), this can be used to create a new catalog.

Deletes a catalog. Only dynamic catalogs (those created through HTTP) can be deleted in this way.

Returns the protocol version of the Sesame interface. The protocol described in this document is 4.

Return a list of repositories available in the catalog.

Creates a new, empty repository.

When a repository with the given name already exists, it is overwritten, unless a parameter override with value false is passed.

Delete the specified repository. This can fail if the repository is being accessed by another client.

Create a backup of the repository.

To conserve resources, makes the database instance and its child processes exit if the instance is unused. Takes no arguments, returns nothing.

Normally unused database instances linger for InstanceTimeout seconds to speed up subsequent open operations.

Return true if the triple-store exists and is accessible to the current user.

Will return an HTTP 401 (Unauthorized) if the user is not authorized to read from the requested catalog and an HTTP 404 (Not Found) if the user is authorized but the store does not exist.

Return the currently active namespaces for the current user in this repository.

The namespaces are returned as tuples with fields prefix and namespace (the URI).

Deletes all namespaces in this repository for the current user.

Create or update a namespace.

The body of the request must contain the URI for the namespace, as plain text.

Delete a namespace.

Return the list of scripts that have been added to this repository.

Return the contents of the script (named by path*) in this repository.

Add or replace the script (named by path*) in this repository with the contents of the body.

Delete the script (named by path*) in this repository.

Starts a new session for the repository.

Returns the repository's UUID.

Returns a representation of the current standby status for repository.

Only supports an application/json accept type.

Set up warm-standby on this repository.

Requires jobname, primary, primaryPort, user, and password parameters. Makes this repository start replicating the source store on the server primary:primaryPort, using the given credentials to gain access.

Stops a replication job.

This command is sent to the client.

Start a warm standby server.

Sent to a repository that is currently functioning as a replication server. Causes a client (identified by the jobname parameter) to take over, making this repository a client of that new server. Takes primary, primaryPort, user, and password parameters, which specify the server on which the client repository lives, and the user account to use to access this server.

The becomeClient boolean parameter, which defaults to true, determines whether the server will start replicating its old client. The enableCommit parameter, also defaulting to true, controls whether no-commit mode will be turned off in the client.

Return the AllegroGraph configuration file

Return the key used for the Google maps API.

Set the key used for the Google maps API.

Retrieve the server's initialization file.

The initialization-file is a collection of Common Lisp code that is executed on every shared back-end when it starts (see [sessions] for more details).

Replace the current initialization file with the body of the request.

Remove the server's initialization file.

Returns lists of strings of the form ("uuid" "age" "description" [unused]), where "uuid" is the job UUID; "age" is the time since the job was created, in seconds; and "description" is the query string. Only query jobs are returned. The fourth element of the list will also be a string but is not currently used and so is not meaningful.

Cancels the specified job.

Return the text used for the large operation warnings.

Set the text used for the large operation warnings.

Return the AllegroGraph log file.

If specified, startAt and length override the all argument.

Retrieve the standard namespaces AllegroGraph uses

Compute a geospatial nD-datatype specification given either a datatype or a list of ordinates.

The list of ordinates is described using $-prefixed names for each of the ordinates (in order). Each name must have a type, a minimum and maximum, a resolution and, optionally, a strip width. For example, these names must be included to describe the ordinate named test:

$test-type  
$test-resolution  
$test-width  
$test-min  
$test-max 

The REST command returns a description of the nD-geospatial subtype specified by the parameters to the query. Currently, this can either be in text/plain or application/json.

Returns a list of tuples describing the server's currently running processes.

Each tuple has pid (the OS process ID), name (the process name), and displayName (a prettier name to use for display) properties.

Returns stack traces for the threads in the given process.

Kills the specified process.

This should only be done if absolutely necessary as it can have adverse effects on the functioning of the server.

Start a telnet server for the specified process.

An arbitrary port will be assigned to the server and returned as the response.

Security Note: any process on the same machine as the AllegroGraph server will be able to connect to the telnet server.

Returns the protocol version of the Sesame interface. The protocol described in this document is 4.

Return the planners that can be used to reorder Basic Graph patterns in a query.

Posting to this URL will cause the server to re-read its configuration file, and update itself to reflect the new configuration.

Causes the server to re-open its log file. This is useful for log rotation.

Return a list of repositories available in the catalog.

Creates a new, empty repository.

When a repository with the given name already exists, it is overwritten, unless a parameter override with value false is passed.

Delete the specified repository. This can fail if the repository is being accessed by another client.

Create a backup of the repository.

To conserve resources, makes the database instance and its child processes exit if the instance is unused. Takes no arguments, returns nothing.

Normally unused database instances linger for InstanceTimeout seconds to speed up subsequent open operations.

Return true if the triple-store exists and is accessible to the current user.

Will return an HTTP 401 (Unauthorized) if the user is not authorized to read from the requested catalog and an HTTP 404 (Not Found) if the user is authorized but the store does not exist.

Return the currently active namespaces for the current user in this repository.

The namespaces are returned as tuples with fields prefix and namespace (the URI).

Deletes all namespaces in this repository for the current user.

Create or update a namespace.

The body of the request must contain the URI for the namespace, as plain text.

Delete a namespace.

Return the list of scripts that have been added to this repository.

Return the contents of the script (named by path*) in this repository.

Add or replace the script (named by path*) in this repository with the contents of the body.

Delete the script (named by path*) in this repository.

Starts a new session for the repository.

Returns the repository's UUID.

Returns a representation of the current standby status for repository.

Only supports an application/json accept type.

Set up warm-standby on this repository.

Requires jobname, primary, primaryPort, user, and password parameters. Makes this repository start replicating the source store on the server primary:primaryPort, using the given credentials to gain access.

Stops a replication job.

This command is sent to the client.

Start a warm standby server.

Sent to a repository that is currently functioning as a replication server. Causes a client (identified by the jobname parameter) to take over, making this repository a client of that new server. Takes primary, primaryPort, user, and password parameters, which specify the server on which the client repository lives, and the user account to use to access this server.

The becomeClient boolean parameter, which defaults to true, determines whether the server will start replicating its old client. The enableCommit parameter, also defaulting to true, controls whether no-commit mode will be turned off in the client.

Returns a JSON object containing information about all pending and a limited number of finished requests for all AllegroServe instances running. This includes requests to the main AllegroGraph URL, the backends and sessions.

Each request contains the following information: - uri - the URL of the request - method - one of HTTP methods like 'get', 'post', etc. - statusCode - response status or null (if request not finished yet) - source - IP and port of the requester - started - Unix timestamp (in nanoseconds) of the moment the request was received by the server - finished - Unix timestamp (in nanoseconds) of the moment the server finished answering the request, or null if the request not finished yet. - duration - Duration of the request in nanoseconds. For pending requests, this is the duration of the request until now.

Requires superuser privileges.

Return a list of the roles defined on the server.

Add a new role to the server.

Remove the role named name from the server.

Retrieve the read/write access for a user.

This returns a result set, each element of which has a read, write, catalog, and repository component. The first two are booleans, the latter two strings. For permissions granted globally, catalog and repository will have a value of "*", for those granted per-catalog, only repository will be "*". catalog normally contains the catalog name, but "/" is used for the root catalog.

For example, read access to all repositories in the public catalog is specified (in JSON format) by:

{read: true, write: false, catalog: "public, repository: "*"} 

Whereas read/write access to repository scratch in the root catalog would be:

{read: true, write: true, catalog: "/", repository: "scratch"} 

Modify the read/write access of a user or role.

Similar to PUT Access but this deletes the read/write access of a user or role.

Return a list of permissions flags that have been assigned to a user or role.

Example flags include super, eval, session.

Return the value of the permission type for a user or role.

Assigns the given permission to this user. type should be super, eval, session or one of the other defined permission flags.

Revokes the given permission for this user.

Get list of security filters for a user.

Type may be allow or disallow. The returned items have keys s, p, o, and g as per the parameters for POST security-filters.

Create security-filter for the user or role.

type should be allow or disallow. The subject, predicate, object and graph fields are all optional. See the Security filters Documentation for more details.

Delete a security-filter for the user or role.

type should be allow or disallow. The subject, predicate, object and graph fields are all optional. See the Security filters Documentation for more details.

Return a list of the names of the scripts stored on the server.

Return the script found at path*

Put a new script in path*.

The body of the request should contain the new script. Scripts whose name ends in .fasl are assumed to be compiled Lisp code (you are responsible for ensuring that it is compatible with the server), anything else is assumed to be raw Common Lisp code, which the server will compile.

Delete the script at path*.

Retrieve any operational warnings from the AllegroGraph server as tuples consisting of a warning identifier tag and descriptive text.

Dismiss the server warning identified by tag.

Only a user with superuser access may dismiss warnings.

Retrieve information about the currently running sessions.

Starts a new session.

The minilanguage used by the store parameter works as follows:

<store1>

Indicates the triple store named "store1" in the root catalog.

<catalog1:store2>

The triple store "store2" in the "catalog1" catalog.

<http://somehost:10035/repositories/store3>

A remote store, by URL. If the URL points to the server itself, the store will be opened locally.

<a> + <b>

The federation of stores "a" and "b".

<a>[rdfs++]

The store "a", with rdfs++ reasoning applied (restriction is also supported as a reasoner type). You can specify the context that inferred triples get using this syntax: <a>[rdfs++#<http://test.org/mycontext>]

<a>{null <http://example.com/graph1>}

Store "a", filtered to only contain the triples in the default graph (null) and the graph named http://example.com/graph1. Any number of graphs can be given between the braces.

This syntax can be composed to created federations of filtered and reasoning stores, for example <http://somehost:10035/repositories/<a>{null} + <b>[rdfs++].

The service returns the URL of the new session. Any sub-URLs that were valid under a repository's URL will also work under this session URL. For example, if http://localhost:55555/sessions/7e8df8cd-26b8-26e4-4e83-0015588336ea is returned, you can use http://localhost:55555/sessions/7e8df8cd-26b8-26e4-4e83-0015588336ea/statements to retrieve the statements in the session.

Returns a list of defined user names.

Create a new user.

Delete the user identified by name.

Retrieve the read/write access for a user.

This returns a result set, each element of which has a read, write, catalog, and repository component. The first two are booleans, the latter two strings. For permissions granted globally, catalog and repository will have a value of "*", for those granted per-catalog, only repository will be "*". catalog normally contains the catalog name, but "/" is used for the root catalog.

For example, read access to all repositories in the public catalog is specified (in JSON format) by:

{read: true, write: false, catalog: "public, repository: "*"} 

Whereas read/write access to repository scratch in the root catalog would be:

{read: true, write: true, catalog: "/", repository: "scratch"} 

Modify the read/write access of a user or role.

Similar to PUT Access but this deletes the read/write access of a user or role.

Each user has a simple key-value store associated with it. This is mostly used by WebView to save settings, but can be useful in other applications.

This service returns a result set containing id and uri fields, listing the keys stored for this user, and the URL under which their data can be found (see below).

Fetches the user-data under key. Returns a string.

Stores data in a user's key-value store. The request body should contain the data to store.

Deletes data from a user's key-value store.

Similar to access, but also includes the access granted to any of the user's roles.

Return a list of permissions flags that have been assigned to a user or any of its roles.

Example flags include super, eval, session.

Get the login timeout for USER, in seconds.

If no there is no timeout -1 will be returned. Also note that timeouts are currently configured globally, not per-user.

Update the password of the user name.

The password must be included in the body of the HTTP request.

Return a list of permissions flags that have been assigned to a user or role.

Example flags include super, eval, session.

Return the value of the permission type for a user or role.

Assigns the given permission to this user. type should be super, eval, session or one of the other defined permission flags.

Revokes the given permission for this user.

Return a list of the user's roles

Add a role to a user.

Remove a role from a user.

Get list of security filters for a user.

Type may be allow or disallow. The returned items have keys s, p, o, and g as per the parameters for POST security-filters.

Create security-filter for the user or role.

type should be allow or disallow. The subject, predicate, object and graph fields are all optional. See the Security filters Documentation for more details.

Delete a security-filter for the user or role.

type should be allow or disallow. The subject, predicate, object and graph fields are all optional. See the Security filters Documentation for more details.

Return all of the UUIDs of the repositories in all the catalogs

Returns the version of the AllegroGraph server, as a string. For example 4.0.

Return the date on which the server was built.

Return detailed information about the server.

Return the git hash of the revision that the server was built from.

Execute a SPARQL or Prolog select query

Return the access permissions the current user has for this repository.

Returns a list of alists with information about all attribute definitions. If NAME is supplied, returns a list with a single alist with information about the named attribute. Returns nil if there is no defined attribute with that name.

Establishes or updates a triple attribute definition.

Attributes must be defined before they can be used. Defining an attribute establishes the name of an attribute and any constraints that should be placed on its use.

Deletes an existing attribute definition.

If the named attribute definition was found and deleted, returns true.

If the named attribute definition was not found: If error is true (the default), throws an error. If error is false, returns false/nil.

Note that attribute definitions cannot be deleted if they are in use by the static attribute filter. An attempt to delete an attribute definition while it is in use will result in an error.

Returns the current static attribute filter for the triple store.

Sets the static attribute filter for the triple store.

When set, only triples which match the filter will be returned by any query against the store.

Deletes the current static attribute filter for the triple store (if any).

Begin a transaction

Return one or more blank nodes.

Returns whether or not bulk-load mode is enabled for the repository.

Enable bulk-load mode for the repository.

Disable bulk-load mode for the repository.

Convert the store into one that supports Callimachus trigger behavior

Commit the current transaction

Fetches a list of named graphs in the store.

Returns a set of tuples, each of which only has a contextID field, which is an N-triples string that names the graph.

Return whether or not the store should create secondary indices (UPI-maps) at query time.

Update the automatic secondary indices creation (UPI-maps) setting.

Turn off automatic secondary indices creation (UPI-maps).

Return the next amount encoded IDs for prefix

Return information on any registered encoded IDs.

Returns a set of tuples with keys: prefix, format, and id.

Register encoded IDs for the repository.

Use either the prefix and format arguments to specify a single encoded ID or encode a collection of registrations into a JSON array of form and include this in the body of the request.

Removes the encoded ID associated with prefix.

Note that it is an error if the encoded ID has been already been used in the triple-store.

Returns whether or not the repository has any encoded IDs registered.

Returns whether or not any triples have been added using the encoded ID associated with prefix.

Returns whether or not a prefix is registered as an encoded ID.

Evaluates the request body in the server.

By default, it is evaluated as Common Lisp code, with *package* set to the db.agraph.user package. If you specify a Content-Type of text/javascript, however, the code will be interpreted as JavaScript.

Makes an attempt to return the result in a sensible format, falling back to printing it (as per prin1) and returning it as a string.

Query the repository using a free-text index

Return a list of freetext indices defined on the store

Return information on the freetext-index named indexName.

Modify the freetext-index named indexName.

Create or modify a freetext-index named indexName.

Delete the free-text index indexName.

Return the border characters for the text index

Return the triple-fields that the index indexes

Return whether or not the index indexes literals

Return whether or not the index indexes resources

Return the inner characters for the text index

Return the minimum word size of the text index

Return the predicates on which the text index is defined

Return the stop words defined for the text index

Return the tokenizer for the text index

Return the word filters specified for the text index

Define one or more Prolog functors.

The body should contain the functors to be defined.

Fetch all triples with a given predicate whose object is a geospatial value inside the given box.

Retrieve triples whose object falls inside a circle.

Retrieve triples whose object lies within a circle in a spherical system.

Retrieve triples whose object lies inside a polygon.

Add a new polygon to the repository.

Retrieve a list of geospatial types defined in the store.

Add a new geospatial sub-type to the triple-store.

Define a new Cartesian geospatial type.

Returns the type resource which can be used as the type argument in other geospatial services. The xmin, xmax, ymin, and ymax arguments determine the size of the Cartesian plane that is modelled by this type.

Returns the geospatial subtype based on its UUID.

Define a spherical geospatial type.

Returns the type resource which can be used as the type argument in other geospatial services. The latmin, longmin, latmax, and longmax can be used to limit the size of the region modelled by this type. The default is to span the entire sphere.

Return a list of indices defined on the triple-store

Add an index of type to the triple-store.

Drop the index type from the triple-store.

Optimize the triple-store indices

Returns job information for the current store.

Returns lists of strings of the form ("uuid" "age" "description" [unused]), where "uuid" is the job UUID; "age" is the number of seconds since the job was created; and "description" is the query string. Only query jobs are returned. The fourth element of the list will also be a string but is not currently used and so is not meaningful.

Cancels the specified job for the current store.

Schedules a background operation to purge deleted triples from the specified indices.

Cancels purge deleted triple job for the specified indices.

Return the datatype and predicate mappings for the repository.

Remove any user-defined datatype and predicate mappings.

Remove all datatype and predicate mappings (included the default ones).

Add a new predicate mapping between predicate and encoding.

Remove any predicate mapping on predicate.

Define a Cartesian type-mapping between predicate and the geospatial subtype specified by uuid.

Define a spherical type-mapping between predicate and the geospatial subtype specified by uuid.

Add a new datatype mapping between type and encoding.

Remove the datatype mapping between type and encoding.

Define a Cartesian datatype mapping between the datatype type and the geospatial subtype specified by uuid.

Define a spherical datatype mapping between the datatype type and the geospatial subtype specified by uuid.

Use materialization to add inferred triples to the store.

Delete any materialized triples

Return the mongoDB settings for the repository.

The settings include:

• server - server name where MongoDB is running
• port - port to use to communicate with MongoDB
• database - name of the database to use when querying MongoDB
• collection - name of the collection to use when querying MongoDB
• user - used to authenticate to the Mongo DB server

Note, the mongoDB password is not returned. Use the POST request to change the parameters.

Update the triple-store's MongoDB setting. See MongoDB interface for additional details.

Return the currently active namespaces for your user in this repository

Namespaces are returned as tuples with prefix and namespace (the URI) fields.

Deletes all namespaces in this repository for the current user.

Associate prefix with the uri as a namespace abbreviation.

Remove any namespace abbreviation associated with prefix.

Returns whether or not automatic geospatial datatype recognition is enabled for this store.

Turns on automatic geospatial datatype recognition so that 2, 3 and n-dimensional data can be easily loaded.

Turns off automatic geospatial datatype recognition.

Returns whether or not the whether the current transaction has any changes that require a commit.

Create a neighbor-matrix, which is a pre-computed generator.

Return whether this repository is currently in no-commit mode.

When this mode is active, all commits from any clients will return an error which effectively prevents writing to the store. This is used by warm standby clients, and can also be used to enforce read-only stores.

Turns on no-commit mode.

Turns off no-commit mode.

Execute a saved query

Remove a prepared query

Roll back the current transaction (discard all changes made since since the beginning of the current transaction) and then roll forward to the latest database state.

Return whether or not auto-commit is currently active for this session.

Deprecated with Sesame 2.7; see isActive instead.

Change the auto-commit behavior for the session.

Stop a session.

Return a description of the session.

Return whether or not there is an open transaction.

Send a message to a session in order to keep it alive.

Returns the deleted triple purge operation rate limit (read IOs per second). 0 means no limit.

Sets the deleted triple purge operation rate limit (read IOs per second). Note that this setting is not persistent. It will revert to 0 the next time the database instance is started.

Returns the number of statements in the repository, as an integer.

Execute an SNA path search from start to end.

The searchMode controls whether breadthFirst, depthFirst, or bidirectional search is used (breadthFirst is the default). The SNA generator can either be specified by name using the generator parameter (assuming, of course, that the named generator has been previously defined on the server). Alternately, a generator can be built dynamically from the predicate, predicateTo and predicateFrom parameters. Each of these can be specified multiple times. Each URI in the predicate list will be used to find undirected paths whereas each URI in the predicateTo and predicateFrom lists will be used to find objects and subjects (respectively).

The graph parameter, which can be specified multiple times, can be used to restrict path searching to triples in only the specified graphs.

Lastly, the maximumDepth parameter can be used to limit the total search depth.

This returns a list of paths in JSON format where each path is a list of nodes along the path (including the starting and ending nodes). Each node will be either a subject or object of the triples that created the path.

Creates a new SNA generator under the given name.

Return the Solr settings for the repository.

Set the Solr settings for the repository

Execute a SPARQL or Prolog select query

Return information about any defined SPIN functions

Return information about the SPIN function associated with uri.

Associate a SPIN function with uri.

Remove the SPIN function associated with uri.

Return a list of SPIN magic properties defined for the store.

Return information about the SPIN magic property associated with uri.

Associate a SPIN magic property with uri.

Remove the SPIN magic property associated with uri.

Add a triple to the repository.

The subj, pred, and obj arguments must be supplied and are used to fill in the subject, predicate and object parts of the triple. The context argument is used to fill in the triple's graph but may be left off. In this case, the triple's graph will be the default graph of the repository.

The subj, pred, obj, and context (if supplied) arguments must all be in URI encoded N-Triples notation.

The service returns the triple-ID of the newly added triple.

Add triples to the triple-store.

This service can add triples in several ways:

• Via a SPARQL Update command. To do this use the update parameter. The baseURI, context, remove-graph-uri, insert-graph-uri, using-graph-uri, using-named-graph-uri and infer parameters are all used in this case. Note that you can also send a POST request directly to the repository where the body of that request contains the update command.

• Via AllegroGraph's bulk-load tool agload. In this case, the file or url parameters specify the location of the data to be loaded. The bulkLoad, bulkLoaders, externalReferences, baseURI and context parameters are used as parameters to agload.

• Via AllegroGraph's direct load facility. The source of the data can be either from a file, located at a url or directly included in the body of the request. In the latter two cases, the request's Content-Type header or the query's type parameter must be used to specify the type of the data. You can use continueOnError, commit, context, baseURI and externalReferences parameters to control the load.

When the PUT method is used, triples in the supplied context are first deleted (if no context is supplied, then the store is completely emptied), whereas the POST method just adds triples. The value returned is an integer indicating the number of triples loaded.

The Content-Type header determines the way the given data is interpreted. The following formats are supported:

• text/plain for N-triples
• application/rdf+xml for RDF/XML
• text/x-nquads for N-quads
• application/trix for TriX
• text/turtle for Turtle
• application/json for JSON data (an array of arrays of strings, with the inner arrays having 3 or 4 elements each)
• application/x-rdftransaction for a transaction XML document

Small data sources are best loaded via the direct facility whereas large data sources should be loaded via agload.

Delete statements (triples) by matching against their components.

All parameters are optional -- when none are given, every statement in the store is deleted. The patterns to match come in pairs for subject, predicate, object, and graph. When given, they should be specified in N-triples notation.The subjEnd, predEnd, objEnd and contextEnd can only by specified if their matching entries is also supplied. At most one end parameter may be supplied.

Delete a set of triples from the store.

Expects a JSON-encoded array of triples as the posted data, and deletes each statements listed.

The Content-Type must be application/json.

Return duplicate triples from the repository

Remove duplicate triples from the repository

Commit defaults to true if the connection has autocommit mode on.

Return triples by their triple IDs

Retrieves statements (triples) by matching against their components.

All parameters are optional -- when none are given, every statement in the store is returned. The patterns to match come in pairs for subject, predicate, object, and graph. When given, they should be specified in N-triples notation. subj, pred, obj and context can be given multiple times. The subjEnd, predEnd, objEnd and contextEnd can only by specified if exactly one of their matching entries is supplied. At most one end parameter may be supplied.

Return the triple-store ID.

Attempts to page in and lock the current strings data into memory. String data added after this call will not be locked.

The ability to lock is limited by the 'memlock' rlimit and available memory. Increasing the 'memlock' limit requires Systems Administrator intervention.

Removes any existing string data memory locks

Returns the store's current duplicate suppression strategy.

Duplicate suppression controls if and how AllegroGraph checks triples that are about to be committed against triples that already exist in the triple-store.

It can be:

* `false` - no duplicate suppression is in effect,  
* `spog` - on commit, do not add triples that match some existing triple on  
subject, predicate, object and graph, or 

spo - on commit, do not add triples that match some existing triple on subject, predicate, and object. 

Sets the duplicate suppression strategy for the store.

Disable duplicate suppression for the store.

This is the equivalent of using PUT /repositories/(name)/suppressDuplicates with false as the type argument.

Returns the size of the triple-cache (SPOGI cache).

Returns zero if the cache is disabled.

Sets the size of the triple-cache (SPOGI cache).

Disable the triple-cache (SPOGI cache).

Return the unique values for the specified column.

column must be one of:

• subject, subj or s to return unique subjects,
• predicate, pred or p to return unique predicates,
• object, obj or o to return unique objects, or
• graph, g, context or c to return unique graphs (contexts).

Use the subj, pred, obj and context arguments to limit the triples that are examined.

This can be very expensive in time and space on a large triple-store.

Return whether or not the store should use secondary indices (UPI-maps).

Change the secondary indices (UPI-maps) usage setting.

Turn off secondary indices (UPI-maps) usage.

Bring as much as possible of the triple-store's internal data-structures into memory.

Tell the server to close a triple-store