RDQL
select
?uri,?name, ?lat, ?lon
from
<http://swordfish.rdfweb.org/discovery/2003/11/cities/xmlrdf.jsp?query=port>
where
(?city, <rdfs:label>, ?name),
(?city, <rdfs:label>,?uri),
(?city, <pos:lat>, ?lat),
(?city, <pos:long>, ?lon)
using
rdfs FOR <http://www.w3.org/2000/01/rdf-schema#>,
pos FOR <http://www.w3.org/2003/01/geo/wgs84_pos#>,
doilair FOR <http://www.daml.org/2001/10/html/airport-ont#>,
vcard FOR <http://www.w3.org/vcard-rdf/3.0#>
2003-11-20
Dirk Willem van Gulik
RDQL
select
?uri,?name, ?lat, ?lon
from
<http://foaf.asemantics.com/dirkx>
where
(?person, <rdf:type>, <foaf:Person>),
(?person, <foaf:name>, ?name),
(?person, <foaf:based_near>, ?bn),
(?person, <foaf:mbox>,?uri),
(?bn, <pos:lat>, ?lat),
(?bn, <pos:long>, ?lon)
using
rdf FOR <http://www.w3.org/1999/02/22-rdf-syntax-ns#>,
rdfs FOR <http://www.w3.org/2000/01/rdf-schema#>,
foaf FOR <http://xmlns.com/foaf/0.1/>,
dc FOR <http://purl.org/dc/elements/1.1/>,
pos FOR <http://www.w3.org/2003/01/geo/wgs84_pos#>
2003-11-20
Dirk Willem van Gulik
RDQL
select
?uri,?name, ?lat, ?lon
from
<http://foaf.asemantics.com//few.airports.rdf>
where
(?airport, <airportonto:name>, ?name),
(?airport, <airportonto:location>,?uri),
(?airport, <airportonto:longitude>, ?lon),
(?airport, <airportonto:latitude>, ?lat)
using
rdf FOR <http://www.w3.org/1999/02/22-rdf-syntax-ns#>,
rdfs FOR <http://www.w3.org/2000/01/rdf-schema#>,
foaf FOR <http://xmlns.com/foaf/0.1/>,
dc FOR <http://purl.org/dc/elements/1.1/>,
pos FOR <http://www.w3.org/2003/01/geo/wgs84_pos#>,
airportonto FOR <http://www.daml.org/2001/10/html/airport-ont#>
2003-11-20
Dirk Willem van Gulik
N3
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>.
@prefix dc: <http://purl.org/dc/elements/1.1/>.
@prefix dcq: <http://purl.org/dc/terms/>.
@prefix etbthes: <http://eun.org/etb/thesaurus/elements/>.
@prefix rss: <http://purl.org/rss/1.0/>.
@prefix log: <http://www.w3.org/2000/10/swap/log#>.
@prefix string: <http://www.w3.org/2000/10/swap/string#>.
@prefix : <#>.
@prefix result: <result#>.
{
[ dc:title [
rdf:value ?title_value;
dc:language [dcq:RFC1766 ?title_language]];
dc:subject [
etbthes:ETBT [
rdf:value ?subject_value;
dc:language [dcq:RFC1766 ?subject_language]]];
dc:description [
rdf:value ?description_value;
dc:language [dcq:RFC1766 ?description_language]];
dc:identifier ?identifier;
dc:language [dcq:RFC1766 ?language]].
} => {
[ result:titleValue ?title_value;
result:titleLanguage ?title_language;
result:subjectValue ?subject_value;
result:subjectLangauge ?subject_language;
result:descriptionValue ?description_value;
result:descriptionLangauge ?description_language;
result:langauge ?language;
result:identifier ?identifier].
}.
2003-03-02
Tim Berners-Lee
See http://www.w3.org/2000/10/swap/test/query/t08.n3
N3
@prefix rss: <http://purl.org/rss/1.0/>.
@prefix log: <http://www.w3.org/2000/10/swap/log#>.
@prefix string: <http://www.w3.org/2000/10/swap/string#>.
@prefix : <#>.
this log:forAll :t, :l.
{
<http://xmlhack.com/rss10.php>.log:semantics log:includes {
[] a rss:item; rss:title :t; rss:link :l.
:t string:containsIgnoringCase "XML". }
} => {
[] :title :t; :link :l
}.
2003-03-02
Tim Berners-Lee
See http://www.w3.org/2000/10/swap/test/query/t07.n3
N3
@prefix rss: <http://purl.org/rss/1.0/>.
@prefix log: <http://www.w3.org/2000/10/swap/log#>.
@prefix : <#>.
this log:forAll :t, :l.
{
<http://xmlhack.com/rss10.php>.log:semantics log:includes {
[] a rss:item; rss:title :t; rss:link :l }
} => {
[] :title :t; :link :l
}.
2003-03-02
Tim Berners-Lee
See http://www.w3.org/2000/10/swap/test/query/t06.n3
N3
@prefix con: <http://www.w3.org/2000/10/swap/pim/contact#>.
@prefix string: <http://www.w3.org/2000/10/swap/string#>.
@prefix log: <http://www.w3.org/2000/10/swap/log#>.
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix data: <#>.
@prefix : <#>.
{ [] :Given ?g; :Family ?f; :favoriteSport ?s.
?s :label ?l.
("<tr><td>" ?g "</td><td>" ?f "</td><td>" ?l "\n" )
string:concatenation ?r } => { ?l log:outputString ?r }.
"000" log:outputString """<html><body>
<h1>Ordered by sport</h1>
<table>
""".
"ZZZ" log:outputString "</table></body></html>\n".
# test data:
:soccer :label "Soccer".
:tennis :label "Tennis".
[] :Given "Andrew"; :Family "Other"; :favoriteSport :soccer.
[] :Given "Jane"; :Family "Doe"; :favoriteSport :tennis.
[] :Given "Jane"; :Family "Smith"; :favoriteSport :soccer.
[] :Given "John"; :Family "Smith"; :favoriteSport :tennis.
[] :Given "Marmaduke"; :Family "Smith"; :favoriteSport :soccer.
[] :Given "Smith"; :Family "Robinson"; :favoriteSport :soccer.
2003-03-02
Tim Berners-Lee
See http://www.w3.org/2000/10/swap/test/query/t05.n3
N3
# @@ would be nice to have this just use --mode=rsme --think
# to pick up hte schema data automatically
#
@prefix con: <http://www.w3.org/2000/10/swap/pim/contact#>.
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix data: <#>.
@prefix : <#>.
{data:x ?p ?v. ?p rdfs:range ?c} => {[] :prop ?p; :range ?c; :val ?v }.
# test data:
data:x con:office [
con:address [ con:street "Lombard Street" ]];
con:home [
con:address [ con:street "Islington Gardens"]].
# test metadata: (a subset of the schema)
con:office rdfs:range con:Location.
con:home rdfs:range con:Location.
con:address rdfs:range con:Address.
2003-03-02
Tim Berners-Lee
See http://www.w3.org/2000/10/swap/test/query/t04.n3
N3
@prefix this: <#>.
@prefix con: <http://www.w3.org/2000/10/swap/pim/contact#>.
@prefix vcard: <http://www.w3.org/2001/vcard-rdf/3.0#>.
@prefix : <http://www.w3.org/2001/vcard-rdf/3.0#>.
# @@ Test case is not schema-valid - see vcard schema.
{[] :Family "Smith"; :Given ?g } => { ?g a this:SmithFamilyMember }.
# test data:
[] :Given "Andrew"; :Family "Other".
[] :Given "Jane"; :Family "Doe".
[] :Given "Jane"; :Family "Smith".
[] :Given "John"; :Family "Smith".
[] :Given "Marmaduke"; :Family "Smith".
[] :Given "Smith"; :Family "Robinson".
2003-03-02
Tim Berners-Lee
See http://www.w3.org/2000/10/swap/test/query/t03.n3
N3
@prefix email: <http://www.hpl.hp.com/email/email#>.
{ ?x email:message-id "123456@example.com" }
=>
{ ?x email:message-id "123456@example.com" }.
# test data
@prefix : <#>.
:m1235 email:message-id "814358768@example.com";
email:from "whoever@example.com".
:m1236 email:message-id "814358432168@example.com";
email:from "whoever@example.com".
:m12314 email:message-id "123456@example.com";
email:from "whoeverelse@example.com".
2003-03-02
Tim Berners-Lee
See http://www.w3.org/2000/10/swap/test/query/t02.n3
RDF properties retrieval using provenance information (context/scope/formulae)
RDF sources once parsed and stored into an RDF database are flatten down and at the query time you very often need to filter them based on the "context" where they have been asserted - i.e. source URL or some other RDF resource which could be further described.
2003-04-20
Alberto Reggiori
The concept of statement "context" (scope/provenance) is out of the RDF model and has not been considered yet for inclusion into the RDF specifications. Some RDF toolkits out there allow to SELECT triples using one more dimension/component (s,p,o + c) - it is not clear at all to me where this "extension" is going to fit into the RDF framework (i.e. reification and higher-oder statements) but it is definitively needed as soon as you start writing real-world applications.
An optional RDF property retrieval
As soon as you start writing real-world RDF applications you need "partial matches", otherwise you have to go back to API and "build the query by hand"; because RDF data nature is generally irregular, incomplete, perhaps expressed using different data granularity, deeply nested.
Show an optional property retrieval support in RDF query languages - see <a href="http://www.mozilla.org/docs/xul/xulnotes/template-bindings.html">here</a> for an RDF/XUL related example including some sample RDF/XML data.
2003-04-20
Alberto Reggiori
One generalization is for queries to be in three parts: locate, extract and present.
Locate is all exact matches of the (conjunctive) query graph pattern (c.f. QL98) and produces a number of solutions, where each solution is a set of variable bindings.
Extract is zero or more optional patterns, each of which is tried for each exact match and can extend each variable binding set with new variables (need not do so for all solutions).
Present deals with the form of the output. This may be the variables actually required, like in a SELECT clause, or it may be an RDF template where a graph has variables in it. The values of the variables are substituted to form a subgraphs for each solution.
Example:
In a system like cwm, the left-hand side of log:implies is the locate part, the right-hand side is the present part. There is no extract (optional bindings).
Similarly in RDQL and Inkiling, the locate part is the WHERE clause, the present part is the SELECT clause (not RDF) and there is no extract part.
DQL does have this optionality through the 'may bind' variables.
Issue: this implicit model of query execution may be limited in tha optional variable bindings in the extract part do not take part in the locate process.
What use cases does this miss?
Is it compatible with a path-like view of query?
What use cases does this miss?
Is it compatible with a path-like view of query?
Authors of a paper with emails
An example based on "A Comparison of RDF Query Languages" by Peter Haase et al, http://www.aifb.uni-karlsruhe.de/WBS/pha/rdf-query.
some-paper is related by fact#:title to some-title
that-paper is related by fact#:author to some-description
that-description is related by some-rdf-node to some-home-page
that-home-page is related by fact#:name to some-name
that-home-page is related by fact#:email to some-email
--------------------------------------------------------------
that-name is an author , with email that-email , of that-title
2004-06-16
Adrian Walker
Notes: To run the query, and others, and to modify the example, please log in to the "demo" ID of the Internet Business Logic system at www.reengineeringllc.com .
Pick RDFQueryLangComparison1, and view/change or run it using a browser.
Versa
data:x - (all() |- rdfs:range -> *) -> *
2002-06-23
Uche Ogbuji
Versa
("Smith" <- vcard:Family - *) - vcard:Given -> *
2002-06-23
Uche Ogbuji
Can also write (all() |- vcard:Family -> "Smith") - vcard:Given -> *
Versa
all() |- email:message-id -> eq('123456@example.com')
2002-06-23
Uche Ogbuji
Versa, like XPath, does not define the method of namespace prefix to URI mapping. For instance, when Versa is embedded in XSLT, it uses the namespaces declared on the XSLT extension instruction.
Versa
distribute(all(),
'distribute(.-dc:title->*,
".-rdf:value->*",
"(.-dc:language->*)-dcq:RFC1766->*",
)',
'distribute((.-dc:subject->*)-etbthes:ETBT->*,
".-rdf:value->*",
"(.-dc:language->*)-dcq:RFC1766->*",
)',
'distribute(.-dc:description->*,
".-rdf:value->*",
"(.-dc:language->*)-dcq:RFC1766->*",
)',
'distribute(.-dc:identifier->*,
".-rdf:value->*",
"(.-dc:language->*)-dcq:RFC1766->*",
)',
)
2002-06-23
Uche Ogbuji
I'm not sure I really follow this case. My example is based on trying to follow the logic of the RDQL example.
Versa
(type(rss:item) |- rss:title -> contains('RDQL')) -> rss:link
2002-06-23
Uche Ogbuji
Again it's up to the environment to provide the RDF model and namespace mappings. But how are we measuring "latest" here? Just the stuff int he current RSS feed?
Versa
distribute(type(rss:item),
'. - rss:title -> *',
'. - rss:link -> *')
2002-06-25
Uche Ogbuji
Cool. An example whose RDF model I can divine. However, Versa does not define the method of setting the model. I really think that all these I/O matters cloud and reduce flexibility in a query language. Versa learns from the very successful XPath in its focus on the query, and not the environment.
In the 4Suite impl, I can do the following from the command line:
4versa -r http://xmlhack.com/rss10.php "distribute(type(rss:item),'. - rss:title -> *','. - rss:link -> *')"
Versa
distribute(type(hdr:HeaderField),
'. - hdr:fieldName -> *',
'. - rdfs:label -> *',
'distribute(. - hdr:protocol -> *,
". - hdr:protocolName -> *",
". - hdr:specification -> *",
". - hdr:document -> *")
)
2002-06-23
Uche Ogbuji
I really need a decent explanation of this use case in order to have a chance of submitting anything supposedly equivalent to the other examples given. The description isn't much use. If I understand correctly, one of the keys here is host variable binding. Versa doesn't mandate output: that's left up to the host environment. This example merely renders the desired values.
Schools Chemical Order Processing system
new system must be quick, efficient service. ABle to ship orders.
Able to order/query an order. same service to telesales.
Able to track the order, check their status online, able to query their order, customer allowed to cancel their order.
Notify the shipping agent of order being sent off.
Re-ordering of chemicals must be triggered.
2003-11-19
The Chemical Component Company (CCC)
create roles
assign roles
2004-02-18
rishi
Find the language specific value of a property
Retrieve the value of a property for a particular language (as specified by xml:lang). Specifically, retrieve the english description of each class specified in http://www.w3.org/2000/01/rdf-schema#
2002-06-25
Geoff Chappell
RDFQL
session.namespaces["vcard"] = "http://www.w3.org/2001/vcard-rdf/3.0#";
session.namespaces["data"] = "file://test/";
session.namespaces["rdfs"] = "http://www.w3.org/2000/01/rdf-schema#";
select ?property, ?value, ?type using somedata where
{?property [data:x] ?value} and {[rdfs:range] ?property ?type}
2002-06-25
Geoff Chappell / Intellidimension
RDFQL
session.namespaces["vcard"] = "http://www.w3.org/2001/vcard-rdf/3.0#";
select ?v using somedata where {[vcard:N] ?x ?y}
and {[vcard:Family] ?y 'Smith'} and {[vcard:Given] ?y ?v}
2002-06-23
Geoff Chappell / Intellidimension
Create Order
i dont know
2002-09-12
Sami Sharaiha
i dont know
phone directoy
Connection of phones
2003-09-17
stevens
SeRQL
select
NAME, STREET
from
{} <nc:friends> {FRIENDS} <rdfs:member> {FRIEND},
{FRIEND} <nc:name> {NAME};
[<nc:address> {} <nc:street> {STREET}]
using namespace
nc = <!http://home.netscape.com/NC-rdf#>
2003-10-28
Arjohn Kampman
SeRQL supports optional path expressions which can be mixed with non-optional path expressions by surrounding them with square brackets. Optional path expressions can even be nested, which is required when several optional path expressions depend on another optional path expressions. More information about and examples for SeRQL's optional path expressions can be found at http://sesame.aidministrator.nl/publications/SeRQLmanual.html
SeRQL
SELECT
title_value, title_language,
subject_value,subject_language,
description_value, description_language,
language,
identifier
FROM
{x} <dc:title> {} <rdf:value> {title_value};
<dc:language> {} <dcq:RFC1766> {title_language},
{x} <dc:subject> {} <etbthes:ETBT> {} <rdf:value> {subject_value};
<dc:language> {} <dcq:RFC1766> {subject_language},
{x} <dc:description> {} <rdf:value> {description_value};
<dc:language> {} <dcq:RFC1766> {description_language},
{x} <dc:identifier> {identifier},
{x} <dc:language> {} <dcq:RFC1766> {language}
USING NAMESPACE
dc = <!http://purl.org/dc/elements/1.1/>,
dcq = <!http://purl.org/dc/terms/>,
dct = <!http://purl.org/dc/dcmitype/>,
etb = <!http://eun.org/etb/elements/>,
etbthes = <!http://eun.org/etb/thesaurus/elements/>
2003-04-04
Arjohn Kampman
SeRQL
SELECT link
FROM
{item} <rdf:type> {<rss:item>};
<rss:title> {title};
<rss:link> {link}
WHERE
title like "*RDQL*"
USING NAMESPACE
rss = <!http://purl.org/rss/1.0/>
2003-04-04
Arjohn Kampman
SeRQL does not have a mechanism to specify a datasource in a query itself, instead, the query engine's context determines which data the query should be evaluated against.
SeRQL
select
class, descr
from
{class} <rdf:type> {<rdfs:Class>};
<rdfs:label> {descr}
where
lang(descr) = "en"
2003-04-04
Jeen Broekstra
Not 100% sure if this was the intention of the example. This query retrieves for each class the corresponding english description.
The SeRQL language does not explicitly specify the source model.
SeRQL
SELECT *
FROM
{Header} <rdf:type> {HeaderField};
<hdr:fieldName> {Name};
<rdfs:label> {Purpose};
<hdr:protocol> {P} <hdr:protocolName> {Pname};
<hdr:specification> {Ps} <hdr:document> {Psdocument}
USING NAMESPACE
hdr = <!foo://bar/>
2003-04-04
Arjohn Kampman
SeRQL
select title, link
from {item} <rdf:type> {<rss:item>};
<rss:title> {title};
<rss:link> {link}
using namespace
rss = <!http://purl.org/rss/1.0/>
2003-04-04
Jeen Broekstra
SeRQL
SELECT v
FROM
{x} <vcard:N> {y} <vcard:Family> {"Smith"};
<vcard:Given> {v}
USING NAMESPACE
vcard = <!http://www.w3.org/2001/vcard-rdf/3.0#>
2003-04-04
Arjohn Kampman
The unused variables 'x' and 'y' can optionally be removed from the query, e.g.:
{} <vcard:N> {} <vcard:Family> {"Smith"};
<vcard:Given> {v}
SeRQL
select prop, val, type
from {<data:x>} prop {val},
{prop} <rdfs:range> {type}
using namespace
data = <!file://test/>
2003-04-04
Jeen Broekstra
SeRQL
select x
from {x} <email:message-id> {"123456@example.com"}
using namespace
email = <!http://www.hpl.hp.com/email/email#>
2003-04-04
Jeen Broekstra
RQL
SELECT v
FROM
{x} vcard:N {y}. vcard:Family {fam}
{y} vcard:Given {v}
WHERE
fam = "Smith"
USING NAMESPACE
vcard = http://www.w3.org/2001/vcard-rdf/3.0#
2002-07-3
Arjohn Kampman
RQL
SELECT x
FROM {x} email:message-id {id}
WHERE id = "123456@example.com"
USING NAMESPACE
email = http://www.hpl.hp.com/email/email#
2002-07-3
Arjohn Kampman
RDQ
SELECT
?title_value, ?title_language,
?subject_value,?subject_language,
?description_value, ?description_language,
?language,
?x.dc:identifier
FROM ?x.dc:title{?tt}.rdf:value{?title_value},
?tt.dc:language.dcq:RFC1766{?title_language},
?x.dc:subject.etbthes:ETBT{?ss2}.rdf:value{?subject_value},
?ss2.dc:language.dcq:RFC1766{?subject_language},
?x.dc:description{?dd}.rdf:value{?description_value},
?dd.dc:language.dcq:RFC1766{?description_language},
?x.dc:language.dcq:RFC1766{?language}
USE
rdf for <http://www.w3.org/1999/02/22-rdf-syntax-ns#>,
dc for <http://purl.org/dc/elements/1.1/>,
dcq for <http://purl.org/dc/terms/>,
etbthes for <http://eun.org/etb/thesaurus/elements/>
2002-07-2
Dan Pokorny, Ginger Alliance
RDQ
SELECT ?title, ?link
FROM rss:item::?item.rss:title,
?item.rss:link{?link}
USE
rss for [http://purl.org/rss/1.0/]
2002-07-2
Dan Pokorny, Ginger Alliance
RDQ doesn't specify the data model
RDQ
SELECT
?header,
?header.hdr:fieldName,
?header.rdfs:label,
?p,
?p.hdr:protocolName,
?ps,
?ps.hdr:document
FROM hdr:HeaderField::?header.hdr:protocol{?p}.hdr:specification{?ps}}
2002-07-2
Dan Pokorny, Ginger Alliance
RDQ
SELECT ?property, ?value, ?type
FROM
?x.?property{?value},
?property.rdfs:range{?type}
USE
rdfs FOR [http://www.w3.org/2000/01/rdf-schema#]
2002-07-2
Dan Pokorny, Ginger Alliance
RDQ
SELECT ?v
FROM
?x.vcard:N{?y}.vcard:Family=>'Smith' ,
?y.vcard:Given{?v}
USE
vcard FOR [http://www.w3.org/2001/vcard-rdf/3.0#]
2002-07-2
Dan Pokorny, Ginger Alliance
RDQ
SELECT ?x
FROM ?x.email:message_id=>'123456@example.com'
USE email FOR [http://www.hpl.hp.com/email/email#]
2002-07-2
Dan Pokorny, Ginger Alliance
Note: It's still an open issue how to use dash in property names in RDQ. As a workaround we use full uri here:
SELECT ?x
FROM ?x.[http://www.hpl.hp.com/email/email#message-id]=>'123456@example.com'
Query an ordered container or list
I have fiound it useful to be able to use a query expression to "traverse" (or recall) the elements of an RDF container or a daml:collection style of list; e.g.
Container <member> ?member .
or
List <element> ?element .
2002-09-23
Graham Klyne
This use-case arose from wanting to process a history of events relating to a document editing process (see: http://www.ninebynine.org/wip/DocIssues/RDFConceptIssues.n3, http://www.ninebynine.org/wip/DocIssues/RDFConceptIssues.html).
Container and list queries for the above data have been implemented in my "RDF for little languages" report generator (see http://www.ninebynine.org/Software/Intro.html) The query itself is encoded in Notation3 in the source code file N3GenDocIssues.py.
Query on Date Range
Given a date "searchDate" (formatted as YYYY-MM-DD), query against a model which contains entities with a dc:date Property stored in XMLSchema dateTime format, find all entities (let's say all Individuals/Resources) created BEFORE "searchDate".
2004-05-26
Josh Daigle
RDFQL
session.namespaces["pop3"] = "http://www.intellidimension.com/namespaces/pop3#";
session.namespaces["rdf"] = "http://www.w3.org/1999/02/22-rdf-syntax-ns#";
session.namespaces["rdfs"] = "http://www.w3.org/2000/01/rdf-schema#";
var ds = new DataSource("pop3?server=mail.somewhere.net&user=someuser&pass=xxxx&action=list");
select ?msg ?from using #ds where {[rdf:type] ?msg [pop3:Message]} and
{[pop3:property] ?msg ?prop} and {[rdfs:label] ?prop 'From'} and
{[rdf:value] ?prop ?from} and regexp(?from, 'hotmail')<>''
2002-06-23
Geoff Chappell / Intellidimension
Query uses rdf gateway pop3 dataservice. Docs at:
http://www.intellidimension.com/RDFGateway/Docs/dsguide.asp
queue management for the bank perspective
there will be three main part admin who has the authority to monitor the tellers and can have the authority to set up the ip configuration the tellers can log on and log out and can press the next button and that updates the queue status. the third one is the customers who receive the token and give the ourouse input.
2004-09-04
shormi
N3
@prefix therm: <http://www.example.com/thermal#>.
@prefix math: <http://www.w3.org/2000/10/swap/math#>.
@prefix : <myHouse#>.
@prefix my: <myHouse#>.
{ ?thermostat therm:temp ?t; therm:setting ?s .
?s math:greaterThan ?t .
} => {
?thermostat a therm:CallingForHeat .
}.
{ [] a therm:CallingForHeat } => { :boiler therm:control "ON" }.
# test data:
:livingRoom therm:temp "22"; therm:setting "21".
:bedroom therm:temp "14"; therm:setting "18".
:hall therm:temp "22"; therm:setting "21".
2003-02-27
Tim Berners-Lee
See http://www.w3.org/2000/10/swap/test/query/t01.n3
original file with more comments
R-DEVICE
(deductiverule
?x <- (? (dc:title ?tt) (dc:description ?dd)
((etbthes:ETBT dc:subject) ?ss2)
(dc:identifier ?identifier)
((dcq:RFC1766 dc:language) ?language))
?tt <- (? (rdf:value ?t_val)
((dcq:RFC1766 dc:language) ?t_lang))
?ss2 <- (? (rdf:value ?subject_val)
((dcq:RFC1766 dc:language) ?s_lang))
?dd <- (? (rdf:value ?desc_val)
((dcq:RFC1766 dc:language) ?desc_lang))
=>
(result (title_value ?t_val)
(title_language ?t_lang)
(subj_val ?subject_val)
(subj_lang ?s_lang)
(desc_value ?desc_val)
(desc_lang ?desc_lang)
(language ?language)
(identifier ?identifier))
)
2002-11-13
Nick Bassiliades
R-DEVICE
(deductiverule
(rss:item (rss:title ?title) (rss:link ?link))
(test (str-index "RDQL" ?title))
=>
(result (link ?link))
)
2002-11-13
Nick Bassiliades
R-DEVICE
(deductiverule
(rss:item (rss:title ?title) (rss:link ?link))
=>
(result (title ?title) (link ?link))
)
2002-11-13
Nick Bassiliades
R-DEVICE
(deductiverule
?Header <- (hdr:HeaderField (hdr:fieldName ?name)
(rdfs:label ?purpose)
(hdr:protocol ?p))
?p <- (? (hdr:protocolName ?pn) (hdr:spec ?ps))
?ps <- (? (hdr:document ?psdocument))
=>
(result (header ?Header) (name ?name)
(protocol ?p) (purpose ?purpose)
(pname ?pn) (spec ?ps)
(document ?psdocument))
)
2002-11-13
Nick Bassiliades
R-DEVICE
(deductiverule
data:x <- (? (?property ?value))
?property <- (rdf:Property (rdfs:range $? ?t $?))
=>
(result (property ?property) (value ?value)
(type ?t))
)
2002-11-13
Nick Bassiliades
R-DEVICE
(deductiverule
?x <- (? (vcard:N ?y))
?y <- (? (vcard:Family "Smith") (vcard:Given ?v))
=>
(person (name ?v))
)
2002-11-13
Nick Bassiliades
R-DEVICE
(deductiverule
?x <- (? (email:message-id '123456@example.com'))
=>
(result (email ?x))
)
2002-11-13
Nick Bassiliades
Video Rental
The system will be able to register all video rented and keep a record of all movements
2003-07-30
Emiliano Hernandez
RDQL
SELECT
?title_value, ?title_language,
?subject_value,?subject_language,
?description_value, ?description_language,
?language,
?identifier
FROM
<http://braveheart.eun.org/xml/rdf/example10.xml>
WHERE
( ?x, <dc:title>, ?tt),
( ?tt, <rdf:value>, ?title_value),
( ?tt, <dc:language>, ?ttl),
( ?ttl, <dcq:RFC1766>, ?title_language),
( ?x, <dc:subject>, ?ss1),
( ?ss1, <etbthes:ETBT>, ?ss2),
( ?ss2, <rdf:value>, ?subject_value),
( ?ss2, <dc:language>, ?ss3),
( ?ss3, <dcq:RFC1766>, ?subject_language),
( ?x, <dc:description>, ?dd),
( ?dd, <rdf:value>, ?description_value),
( ?dd, <dc:language>, ?ddl),
( ?ddl, <dcq:RFC1766>, ?description_language),
( ?x, <dc:identifier>, ?identifier),
( ?x, <dc:language>, ?ll1),
( ?ll1, <dcq:RFC1766>, ?language)
USING
rdf for <http://www.w3.org/1999/02/22-rdf-syntax-ns#>,
rdfs for <http://www.w3.org/2000/01/rdf-schema#>,
dc for <http://purl.org/dc/elements/1.1/>,
dcq for <http://purl.org/dc/terms/>,
dct for <http://purl.org/dc/dcmitype/>,
etb for <http://eun.org/etb/elements/>,
etbthes for <http://eun.org/etb/thesaurus/elements/>
2002-06-25
Alberto Reggiori
RDQL/RDFStore
SELECT ?link
FROM <http://xmlhack.com/rss10.php>
WHERE
(?item, <rdf:type>, <rss:item>),
(?item, <rss::title>, ?title),
(?item, <rss::link>, ?link)
AND ?title LIKE '/RDql/i'
USING
rdf for <http://www.w3.org/1999/02/22-rdf-syntax-ns#>,
rss for <http://purl.org/rss/1.0/>
2002-06-25
Alberto Reggiori
Same as the previous example but less efficient requiring to read the whole results in memory and
then prune them; the first example instead will do the free-text triple selection while the actual
triple-patterns are processed (i.e. in the storage self)
RDQL/RDFStore
SELECT ?link
FROM <http://xmlhack.com/rss10.php>
WHERE
(?item, <rdf:type>, <rss:item>),
(?item, <rss::title>, %"RDQL"%),
(?item, <rss::link>, ?link)
USING
rdf for <http://www.w3.org/1999/02/22-rdf-syntax-ns#>,
rss for <http://purl.org/rss/1.0/>
2002-06-25
Alberto Reggiori
This query is leveraring on RDFStore free-text extensions to RDQL/SquishQL
RDQL
SELECT ?title, ?link
FROM <http://xmlhack.com/rss10.php>
WHERE
(?item, <rdf:type>, <rss:item>),
(?item, <rss::title>, ?title),
(?item, <rss::link>, ?link)
USING
rdf for <http://www.w3.org/1999/02/22-rdf-syntax-ns#>,
rss for <http://purl.org/rss/1.0/>
2002-06-25
Alberto Reggiori
For the given resource find the title, the subject, the description and their languages together with the language of the resource and its URL
For the given RDF DC/DCQ resource description find the dc:title, the dc:subject
(encoded using the ETB multilingual thesaurus), the dc:description and their dc:language
qualification; in addition retrieve the dc:language of the resource and dc:identifier given the URL
pointing to it.
2002-06-25
Alberto Reggiori
Find the URL of the latest published articles on XMLHack.com Web site which title contains the word 'RDQL'
Find the URL of the latest published articles on XMLHack.com Web site which title
contains the word 'RDQL'
2002-06-25
Alberto Reggiori
Find the title and URL of the latest published articles on XMLHack.com Web site
Find the title and link (URL) of the latest published articles on XMLHack.com Web site
published as RSS1.0
2002-06-25
Alberto Reggiori
N3/RDF
hrep:HdrProtoPattern :-
( [ rep:var "header" ]
[ rep:and
( [ rep:uri rdf:type ] [ rep:uri hdr:HeaderField ] ),
( [ rep:uri hdr:fieldName ] [ rep:var "name" ] ),
( [ rep:uri rdfs:label ] [ rep:var "purpose" ] ),
( [ rep:uri hdr:protocol ] [ rep:var "p" ]
[ rep:and
( [ rep:uri hdr:protocolName] [ rep:var "pname" ] ),
( [ rep:uri hdr:specification] [ rep:var "ps" ]
[ rep:uri hdr:document ] [ rep:var "psdocument" ] )
] )
] ) .
2002-06-25
Graham Klyne
Custom
( ?Header
( rdf:type hdr:HeaderField &
hdr:fieldName ?name &
rdfs:label ?purpose &
hdr:protocol ?p
( hdr:protocolName ?pname &
hdr:specification ?ps hdr:document ?psdocument ) ) )
2002-06-25
Graham Klyne
RDQL
SELECT ?property, ?value, ?type
WHERE
(<data:x>, ?property, ?value) ,
(?property, <rdfs:range>, ?type)
USING
vcard FOR <http://www.w3.org/2001/vcard-rdf/3.0#>
rdfs FOR <http://www.w3.org/2000/01/rdf-schema#>
rdf FOR <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
data FOR <file://test/>
2002-06-25
Andy Seaborne
RDQL
SELECT ?v
WHERE
(?x, <vcard:N>, ?y) ,
(?y, <vcard:Family>, "Smith") ,
(?y, <vcard:Given>, ?v)
USING
vcard FOR <http://www.w3.org/2001/vcard-rdf/3.0#>
2002-06-25
Andy Seaborne
RDQL
SELECT ?x
WHERE (?x, <email:message-id>, '123456@example.com')
USING email FOR <http://www.hpl.hp.com/email/email#>
2002-06-23
Andy Seaborne
Extract information from RDF for report generation
Given an RDF database of various information, extract selected parts for
generating (say) an HTML document from the content. The result of the query
is a collection of variable bindings that are passed to a report formatter.
This approach has been used in practice for the generation of Internet protocol
registry documents.
2002-06-25
Graham Klyne
Find some values and the assoicated schema information
For a known resource, find the values of properties which have range
information in the schema.
2002-06-25
Andy Seaborne
If no range information from the schema is available, this
query fails to match a property of resource <x>.
Find some value in a data structure
Find the a data value within a larger structure of RDF. For example: find the given name, where we know the family name.
2002-06-25
Andy Seaborne
This depends on the regularity of the data
Find email message give message id
Find an email messages, given some information about the message
where the data records the message headers (RFC2822).
2002-06-25
Andy Seaborne
RDQL
SELECT
?x, ?title, ?date, ?description, ?section, ?acquired, ?source, ?ctx
FROM
<rdfstore://nb@demo.asemantics.com:1234>
WHERE
(?ctx, <dc:date>, "2003-11-14"@it),
(?ctx, <rdf:type>, <rdfstore:Context>),
(?x, <lmn:section>, %"international | national | gossip"%, ?ctx),
(?x, <rdf:type>, <rss:item>, ?ctx),
(?x, <rss:title>, ?title, ?ctx),
(?x, <dc:date>, ?date, ?ctx),
(?x, <rss:description>, ?description, ?ctx),
(?x, <lmn:acquired>, ?acquired, ?ctx),
(?x, <lmn:section>, ?section, ?ctx),
(?items, ?ii, ?x, ?ctx),
(?items, <rdf:type>, <rdf:Seq>, ?ctx),
(?s, <rss:items>, ?items, ?ctx),
(?s, <rdf:type>, <rss:channel>, ?ctx),
(?s, <rss:title>, ?source, ?ctx)
USING
rss FOR <http://purl.org/rss/1.0/>,
lmn FOR <http://www.asemantics.com/schemas/lastminutenews/>,
dc FOR <http://purl.org/dc/elements/1.1/>,
dctypes FOR <http://purl.org/dc/dcmitype/>,
h FOR <http://www.w3.org/1999/xhtml>,
rdf FOR <http://www.w3.org/1999/02/22-rdf-syntax-ns#>, rdfstore FOR <http://rdfstore.sourceforge.net/contexts/>
2003-11-14
Alberto Reggiori
This is a real-world example taken from the NewsBlender http://demo.asemantics.com/biz/lmn/nb/ - see also other "insane" RDQL queries http://demo.asemantics.com/rdfstore/www2003/
Plot Cities on a Map
Take Libby Miller her list of citys - and plot the onces starting with 'port' on a OpenGIS.org Web Mapping Server.
See: http://demo.asemantics.com/biz/swad-e/rdqlplot.pl
2003-11-14
Dirk-Willem van Gulik <dirkx@asemantics.com>
Plot a Person onto a map
Take a single FOAF - and plot it on a OpenGIS.org Web Mapping Server.
See: http://demo.asemantics.com/biz/swad-e/rdqlplot.pl
2003-11-14
Dirk-Willem van Gulik <dirkx@asemantics.com>
Plot Airports onto a map
Take an Airport Ontoogy - and plot them on a OpenGIS.org Web Mapping Server.
See: http://demo.asemantics.com/biz/swad-e/rdqlplot.pl
2003-11-14
Dirk-Willem van Gulik <dirkx@asemantics.com>
XPath/XQuery query over an RDF graph
Query an exisitng XML docuemnt or RDF/XML (or online source/daatabase/rdf-storage or whatever) using some XPath/XQuery (like/friendly) syntax.
Better if the source RDF/XML or XML document comes from some real world dataset which people can easily pick up.
2003-11-14
Alberto Reggiori
XPath (and XQuery) query is user-friendly and most developers (webmasters) like/use it every day - it is important that any RDF/XML query language be XML "friendly" in that sense
linkfail
link fails and the system reroutes traffic to the backup
2004-02-17
cm
Thermostat
The system must be able to handle all common central heating and central air conditioning systems.
2003-02-12
school