source: ChangeLog @ 1535:ce70b9286f2c

Revision 1535:ce70b9286f2c, 17.7 KB checked in by Konstantina Bereta <Konstantina.Bereta@…>, 6 months ago (diff)

updated ChangeLog?

1        * Fixed bug in the query rewritter that occurs when there is a
2          quad pattern and the third element is a constant that contains
3          spaces. Other bugs where also discovered and fixed in the way
4          (i.e., prefixes, non complete rules in regex).
5          (bug #83:
7          Query rewritter will be deprecated in future releases,
8          as any other use of regex as well. The new version will be
9          developed in lower level.
10          (Enhancement #84:
12        * Completed implementation of the period function, that constructs
13          a period with start and end points the given arguments
14        * Fixed a bug that would not return the correct spatial datatype of a
15          projected geometry literal stored in the database.
16          (bug #71:
18        * Now, geometries expressed in CRS84 and a `geo:wktLiteral' datatype
19          are assigned the correct CRS, i.e., EPSG:4326 with a longitude
20          latitude axis order.
22        * Now, we report a parse error when a constant geometry given in a
23          SELECT or HAVING clause is not well-formed according to the WKT
24          specification.
25          (bug #69:
27        * Function `geof:convexHull' is now supported in a Having clause.
29        * Fixed older implementation of `strdf:distance' that would expect two
30          arguments instead of three when present in a HAVING clause.
32        * Fixed a bug that would cause a class cast exception for grounded
33          expressions with function nesting in the SELECT or HAVING clause.
35        * Fixed a bug in which `postgis:ST_Centroid' did not work in the SELECT
36          clause with input geometries from the database.
38        * Fixed a bug that `geof:getSRID' would return an integer instead of a
39          the URI corrresponding to the CRS that the input geometry was
40          expressed.
41          (bug #32:
42        * Fixed a bug that would raise an exception for queries involving two
43          UNION graph patterns and a projection to a predicate or a URI in
44          general.
45          (bug #53:
47Wed Sep 17 20:14:12 2014   Pyravlos Team
49        * Version 3.2.10 released.
51        * The test suite of Strabon has now reached a mature level. It
52          contains tests for both stSPARQL and GeoSPARQL query languages and
53          most of the compliance tests covered in the specification of
54          GeoSPARQL (well, only those tests for the components that we have
55          chosen to implement).
57        * The endpoint now parses Accept headers with multiple values and uses
58          the first mimetype corresponding to a valid stSPARQLQueryResultFormat.
59          (bug #64:
61        * The endpoint now registers a handler for SIGTERM signals, so that if
62          it is run from the command-line (endpoint-exec), then the closing of
63          the connection will be ultimately called.
64          (bug #40:
66        * Strabon goes debian v1. the endpoint-exec jar is now given in a .deb
67          format. By dpkg-ing it, one can run a stand alone strabon endpoint
68          locally.
69          (bug #45
71        * Fixed a bug in which Strabon hanged when a unary spatial construct
72          had a ternary spatial construct as argument.
73          (bug #45
75        * Fixed a bug according to which spatial functions in ORDER BY were not
76          evaluated at all.
77          (bug #62:
79        * Fixed a bug according to which spatial boolean functions appearing
80          in the SELECT clause were raising a NULL pointer exception.
81          (bug #34:
83        * Fixed a bug in queries that contain variables that exist inside
84          spatial functions in select and do not exist in the where clause
85          made Strabon throw a NULL pointer exception.
86          (bug #51
88        * Various changes in the interface and behavior of Strabon Endpoint:
89          - Revised the logos and the sample queries.
90          - Results query limit is set to zero (unlimited).
91          - Users can now store RDF data that is present in a file on the
92            client side (the file is uploaded to the server).
93          - Credentials are now required for uploading files or executing
94            UPDATE queries, unless Strabon Endpoint runs locally (localhost).
95          - When viewing the results of queries in HTML, any URI is now an
96            active link to itself. Previously, that URI was being DESCRIBEd
97            and one was being transferred to a page viewing the result of the
98            DESCRIBE query.
99          - The DESCRIBE functionality can now be accessed through the menu bar.
101        * Fixed a bug where strdf:intersection function did not work as an
102          aggregate when used without 'GROUP BY'.
103          (bug #46
106Sat Oct 19 23:37:23 2013   Pyravlos Team
108        * Version 3.2.9 released.
110        * Added support for the following google chart types: PieChart,
111        AreaChart and ColumnChart to strabon endpoint.
113        * Added Timemap as new results format in Strabon endpoint. This
114        option displays results in a map and a timeline on the same time,
115        using the Timemap js library (
116        The KMLWriter has been extended for that purpose, by transforming
117        dateTime values that are included in the result set into the respective
118        TimeStamp KML primitive (
119        In the "temporals" branch, the values of the strdf:period datatype
120        are converted into the respective KML TimeSpan primitive.
122        * Added extension function <> which is
123        mapped to the ST_Centroid(geometry) extension function of PostGIS.
124        See also: <>.
126        * Added extension function <> which is
127        mapped to the ST_MakeLine(geometry, geometry) extension function of
128        PostGIS. See also: <>.
130        * Added PostGIS vocabulary class.
132        * Added support of all SPARQL result types provided by Sesame (json,
133        xml, csv, tsv, binary). To get the respective writer, just prepend the
134        string "SPARQL/", e.g., "SPARQL/JSON". This is to ensure that we
135        support all SPARQL result formats of the SPARQL Protocol.
137        * Fixed a bug where a non-implemented extension function would make
138        Strabon throw a NULL pointer exception. Now we get away with it
139        through a warning.
141        * Strabon endpoint now publishes the URIs of the supported units of
142        measure for use in strdf:distance and geof:distance functions of
143        stSPARQL and GeoSPARQL, respectively. The URIs are those defined by
144        OGC Units of Measure 1.0 specification which may be found at
145 Strabon endpoint publishes
146        the URIs at http://localhost:8080/endpoint/Capabilities.
148        * Created new module with name 'vocab` and artifactId
149        'strabon-vocabulary` and moved there. Other
150        vocabularies have been added as well, such as Simple Features, and
151        GeoSPARQL.
153        * Strabon endpoint now publishes the URIs of the supported extension
154        functions for stSPARQL and GeoSPARQL. One should access them by
155        hitting the link http://localhost:8080/endpoint/Capabilities.
157        * Support for parsing EPSG URIs in geometry literals with datatype
158        geo:wktLiteral.
159        (bug #33:
161        * Endpoint Client now supports querying of Virtuoso and Parliament endpoints.
163        * Endpoint Client now supports store and update operations, but only
164        for Strabon Endpoints.
166        *Modified the NQUADSTranslator so that the rewritten triples are
167        immediately flushed to the database once they are created.
169        *In the N-Quads format, the fourth element is *optional*. Made proper
170        modification to the storage manager to coply to the specification
171        described here: Now files in
172        NQUADS format can contain quads *or* triples in order to be stored
173        successfully in Strabon.
175        *Fixed bug that occurs when storing periods having "UC" as ending
176        point.
178        *Added an initial set of tests on temporal operations in the
179        testsuite module.
181        *Completed support for temporal updates
183        *Moved vocabulary related to the temporal features of Strabon to the
184        respective "vocabulary" project
186        *The evaluation of temporal joins in the database does not produce
187        cartesian products in the database
189        * GeoSPARQL functions sfCrosses, sfOverlaps, ehOverlaps do not use the
190        ST_Relate PostGIS function (bug #24:
192        * All Simple Features functions of GeoSPARQL do not use the ST_Relate
193        PostGIS function
195        * Added diffTime function. This function performs the difference
196        between two literals of xsd:time datatype and returns a literal of
197        the xsd:time datatype as well.
199        * Added a testsuite package in default branch. Full tester guide can be found
200        in README. Among other, most of GeoSPARQL compliance tests 
201        (, pg. 53) have been
202        implemented.
204        * Changed the definition and implementation of strdf:distance function, by
205        adopting the definition of GeoSPARQL.
206        (bug #23:
208        * Changed the definition and implementation of strdf:buffer function, by
209        adopting the definition of GeoSPARQL.
210        (bug #35:
212        * Added geof:distance and geof:buffer functions, which have the same definition
213        with strdf:distance and strdf:buffer respectively.
214        (bug #32:
216        * Added a download button when performing describe and construct queries at the
217        endpoint.
218        (bug #38:
220        * Fixed a bug, where XMLWriter and TSVWriter did not return geometries with the
221        SRID.
222        (bug #47:
224        * Fixed a bug where the GeoSPARQL construct functions did not return the datatype
225        geo:wktLiteral datatype but strdf:WKT.
227Tue Mar 26 13:28:26 2013   Pyravlos Team
229        * Version 3.2.8 released.
231        * Added support for handling (storing/querying) GeoSPARQL datatypes.
232        (bug #31:
234        * Fixed a bug in StoreOp that wouldn't close the connection, neither
235        rollback the transaction upon an exception. This had as a side effect
236        the abnormal termination of StoreOp (through for example the use of
237        Ctrl-C signal) which was leaving the database locked.
239        * Fixed bug where spatial aggregates (e.g., union) didn't work as
240        expected when the query didn't contain a `GROUP BY' clause.
241        (bug #22:
243        * Updated GeoSPARQL namespaces and fixed function names to comply with
244        the GeoSPARQL specification.
245        (bug #25:
247        *Added preliminary tests on temporal functions in the respective
248        "test" package of the runtime module.
250        *Added option to strabon and endpoint scripts to support storing
251        files in NQUADS format.
253        *When a large file in NQUADS format is going to be stored, it is
254        partitioned and stored in parts. This happens because the translation
255        of quads to triples is a memory intensive job, so, translating and
256        storing the file in batches increases performance.
259Wed Jan 09 18:06:41 2013   Pyravlos Team
261        * Version 3.2.7 released.
263        * Add an extension function
264        <> for computing the
265        span (in milliseconds) between two timestamps.
267        * Added an <endpoint-exec> module. This module builds an executable jar file
268        with an embedded Apache Tomcat 7. To create and run the executable jar just
269        type:
270                $ mvn clean package
271                $ java -jar endpoint-exec/target/strabon-endpoint-executable-*.jar
273        * Modified strabon script and postgis/monetdb.StoreOP class to get an
274        option for storing a RDF file in a named graph. Moreover, the RDF
275        format of the input RDF file now is given as an option (still, if it
276        is missing, it is assumed that the input is in N-TRIPLES format). The
277        option for the format is -f and the option for the named graph is -g
278        (takes a URI as an argument).
280        * Modified the names of the stSPARQL extension functions that
281        utilize the minimum bounding boxes of the involved geometries.
283        *Fixed bug in the evaluation of temporal constructs.
285        *Fixed a major bug that occured when a temporal variable that also took part
286        in a temporal join was projected.
288        *Renamed temporal extension functions to comply with the respective
289        functions of Allen's temporal relations.
291        *Modified the implementation of the temporal relation functions
292        "meets", "starts", "finishes", to comply with the semantics of the
293        respective functions of Allen. These functions are not supported by
294        PostgreSQL Temporal, so, in order to be evaluated in the database
295        level,  we implemented them as PostgreSQL extension functions.
296        ATTENTION: In order to use these functions, the respective sql script
297        that includes them should be loaded to the the temporally (and spa-
298        tially) enabled database.
301Tue Dec 11 19:33:45 2012   Pyravlos Team
303        * Version 3.2.6 released.
305        * Modified the names of the stSPARQL extension functions to comply 
306        with the OGC Simple Features Access standard.
308Tue Dec 11 00:11:43 2012   Pyravlos Team
310        * Version 3.2.5 released.
312        * Added support for storing and querying temporal information.
313        This functionality may be found in the `temporals' branch.
315                 *The datatypes <> and
316                <> are used to
317                represent periods and instants respectively.
319                *The valid time time of triples is represented using quadtruples,
320                with the valid time annotation(instant or period) being the
321                fourth element of the quad. Into this direction:
322                        *Strabon has been extended to support the NQUADS format. The
323                        respective Sesame packages (of version 2.6.9) that support
324                        this format are used.
326                        *NQuadTranslator class has been created. This class uses the
327                        NQUADS parser which is available here:
328                        The initial version of this parser did not include support
329                        for literals as the fourth element of the quad. We exteded
330                        it to support the valid time representations described above.
332                        *The NQUADSTranslator translates quads into triples using the
333                        named graph approach, similar to the one proposed by Tappolet
334                        et al. and described in
336                        *The rdbms level of Strabon has been extended to (i) support
337                        tha period datatype (ii) store the period values in the table
338                        period_values(id, period). The period column is of the period
339                        datatype, offered by the PostgreSQL Temporal extension (
340                        Also, a GiST index is created on this column.
342                        *A rewriting mechanism that converts quad graph patterns into
343                         triple partners using the named graphs approach has been
344                         implemented as a method of the runtime.generaldb.Strabon
345                         class.
347                        *A big part of the temporal functions of stSPARQL has been
348                        imlemented. These functions include:
349                                *The temporal relation functions during, periodOverlaps,
350                                equalsPeriod, nequalsPeriod, adjacent, before, after,
351                                overleft, overright, meets, starts, finishes.
353                                *The period constructors period_intersect, period_union,
354                                 preceding_period, and succeeding_period. The last two
355                                 constructors are implemented using the jtemporal library.
356                                 The other functions are implemented in the database,
357                                 being mapped into the respective functions of PostgreSQL
358                                 Temporal. A complete reference of PostgreSQL Temporal
359                                 can be found here:
361                                 *The temporal constants "NOW" and "UC" (Until Changed)
362                                 are supported.
364                        *The vocabulary of the valid time dimension of stSPARQL can
365                        be found at the TemporalConstants class of the evaluation
366                        module.
368        * Changed behaviour of Strabon and Strabon Endpoint for connecting to
369        a spatially-enabled database. Only one instance of Strabon is allowed
370        at a time.
372        * Implemented a Java client for Strabon Endpoint. The client should be
373        used only with endpoint versions >=3.2.5. The implementation may be
374        found int the `endpoint-client' submodule of maven. Currently, only
375        querying of Strabon Endpoints is supported.
377        * Added support for requesting the capabilities of Strabon Endpoint
378        (fixes Bug #20 <>). See
379        changesets f840796400bf and ?<TBC>? for specific details and how you
380        can determine the capabilities of older endpoints (versions <= 3.2.4).
382        * Updated KML writer to include the projected variables of an stSPARQL
383        query in "ExtendedData" and "Data" tags. This is the proper way to
384        do it if we need to convert a KML to a ESRI shapefile and also include
385        such information as attributes for a feature. See related pages from
386        KML specification:
387                <>
388                <>
390        * Added user authentication for storing RDF data through Strabon
391        Endpoint. The credentials are specified in
392        WEB-INF/ file.
394        * Strabon Endpoints now limits the number of the results to a maximum
395        one. The maximum number is specified in the beans.xml file. This
396        corresponds to parameter "maxLimit". The endpoint script has also been
397        updated correspondingly; the limit can be given using the option "-l".
398        One can disable limiting of query results, by setting the "maxLimit"
399        parameter to 0. Addresses Bug #6
400        (<>).
402        * Added "Known Issues" section to README.
404        * Added -m (more memory) and -M (much more memory) options in strabon
405        script for out-of-memory exceptions.
407        * Fixed Bug #10 (<>). Now
408        KMLWriter handles more geometric types (other than polygons). See
409        changeset 9a3bfee64a39.
411        * Menu and navigation in Strabon Endpoint has changed to use jquery.
412        The menu is now populated using the queries placed inside the beans.xml.
414        * Added BrowseBean and browse.jsp for browsing the RDF data using the
415        Strabon Endpoint.
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