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Re: Precise of Design Evaluations

From: Yoshio Fukushige <fukushige.yoshio@jp.panasonic.com>
Date: Tue, 29 Jun 2004 20:35:49 +0900
Message-ID: <008301c45dcd$3a043690$f1e41b85@steelball>
To: <public-rdf-dawg@w3.org>

Hi all,

> And we're accepting new evaluations, at least thru
> tomorrow's telcon. If a new one comes after that,
> I don't know if I can get it integrated into an
> agenda by 1 July, but we can play it by ear.
>

I evaluated the TriQL (a query language by Chis Bizer for the named graphs).

It's almost the same as the one for RDQL, on which TriQL builds,
but differs in some points, due to its extension for the named graphs:

3.4 Subgraph Results
4.2 Provenance

I put the file in http://www.w3.org/2004/06/29-Yoshio/TriQLevaluation.html.

@@NOTE@@
 I (mis?)interpreted the design objective 4.5 Aggregate Query as saying
the aggregation of the source graphs, not the query results.

If there's any mis-understanding or ambiguous points, please tell me.

Here is less readable(?) text-version:

----------from here----------
Evaluation result of the TriQL

NOTE: This evaluation is based on "TriQL - A Query Language for Named
Graphs"
(http://www.wiwiss.fu-berlin.de/suhl/bizer/TriQL/), which is called
hereafter "the document." in this evaluation.

Convention

TriQL+

TriQL supports this requirement today under a suitable protocol binding
and/or
query language.

TriQL-

the requirement appears to be explicitly outside of the scope of TroQL,
which is
not to say that it could NOT be met by a suitable revision of TriQL.

TriQL?

need more information to make the determination.

Sample Query

  SELECT ?family , ?given
  FROM   <http://example.org/JohnzVcard.rdf>
  WHERE  (?vcard  vcard:FN "John Smith")
         (?vcard  vcard:N  ?name)
         (?name   vcard:Family  ?family)
         (?name   vcard:Given  ?given)
         (?name   vcard:age  ?age)
         (?name   vcard:shoeSize  ?shoeSize)
  AND    ?shoeSize > 5
  AND    ?age >= ?shoeSize
  USING  vcard FOR <http://www.w3.org/2001/vcard-rdf/3.0#>

3.1 RDF Graph Pattern Matching

TriQL+

  WHERE  (?vcard  vcard:FN "John Smith")
         (?vcard  vcard:N  ?name)
         (?name   vcard:Family  ?family)
         (?name   vcard:Given  ?given)
         (?name   vcard:age  ?age)
         (?name   vcard:shoeSize  ?shoeSize)

3.2 Variable Binding Results

TriQL+

SELECT ?family , ?given

From the spec: [[ The variable "?x" will be bound to the label of the
subject
resource. All such "x" are returned ]]


3.3 Extensible Value Testing

TriQL-

Has support for equality and comparison operators for integers and matching
operation for strings

3.4 Subgraph Results

TriQL+?

Yes if the graph is written in TriG or TriX.

The server could return the NAME of the matched graph

  SELECT ?graph
  FROM   <http://example.org/JohnzVcard.rdf>
  WHERE  ?graph (?vcard  vcard:FN "John Smith" .
    ?vcard  vcard:N  ?name .
          ?name   vcard:Family  ?family .
   ?name   vcard:Given  ?given)
          ?name   vcard:age  ?age.
             ?name   vcard:shoeSize  ?shoeSize)
  AND    ?shoeSize > 5
  AND    ?age >= ?shoeSize
  USING  vcard FOR <http://www.w3.org/2001/vcard-rdf/3.0#>

User could get all triples in the matched graph

  SELECT ?subj, ?pred, ?obj
  FROM   <http://example.org/JohnzVcard.rdf>
  WHERE  ?graph (?vcard  vcard:FN "John Smith" .
    ?vcard  vcard:N  ?name .
          ?name   vcard:Family  ?family .
   ?name   vcard:Given  ?given)
          ?name   vcard:age  ?age.
             ?name   vcard:shoeSize  ?shoeSize
   ?subj  ?pred ?obj)
  AND    ?shoeSize > 5
  AND    ?age >= ?shoeSize
  USING  vcard FOR <http://www.w3.org/2001/vcard-rdf/3.0#>

3.5 Local Queries

TriQL+

The EBNF Grammar does not allow file names,for example "example.trig", to
appear
after "FROM" , but in an example appeared in the document, it appears.

3.6 Optional Match

TriQL-

3.7 Limited Datatype Support

TriQL+

AND    ?shoeSize > 5
AND    ?age >= ?shoeSize
AND    ?date > "2003-01-01"^^xsd:date
(the last example is taken from the document)

3.8 Bookmarkable Queries

TriQL-

3.10 Result Limits

TriQL-

3.11 Iterative Query

TriQL-

3.12 Streaming Results

TriQL-

4.1 Human-friendly Syntax

TriQL+

TriQL queries read like a sentence (like RDQL).

4.2 Provenance

TriQL+

This point is what the Named Graphs are for.

  SELECT ?family, ?given, ?graph
  FROM   <http://example.org/JohnzVcard.rdf>
  WHERE  ?graph (?vcard  vcard:FN "John Smith" .
    ?vcard  vcard:N  ?name .
          ?name   vcard:Family  ?family .
   ?name   vcard:Given  ?given)
          ?name   vcard:age  ?age.
             ?name   vcard:shoeSize  ?shoeSize)
  AND    ?shoeSize > 5
  AND    ?age >= ?shoeSize
  USING  vcard FOR <http://www.w3.org/2001/vcard-rdf/3.0#>

4.3 Non-existant Triples

TriQL-

4.4 User-specifiable Serialization

TriQL-

4.5 Aggregate Query

TriQL+

One can specify more than one Source Selector

4.6 Additional Semantic Information

TriQL-

4.6a Additoal Semantic Information(variant)

TriQL-

4.7 Bandwidth-efficient Protocol

TriQL-

4.8 Literal Search

TriQL+

4.9 Boolean Query

TriQL-


----------to  here----------

Cheers,
Yoshio
Received on Tuesday, 29 June 2004 11:15:49 GMT

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