view ChangeLog @ 1455:c349f282f45f

updated changelog
author Konstantina Bereta <>
date Wed Jan 14 13:20:48 2015 +0200 (2015-01-14)
parents 5b6b65340693
children ba8fb069b2ca
line source
1 * Completed implementation of the period function, that constructs
2 a period with start and end points the given arguments
3 * Fixed a bug that would not return the correct spatial datatype of a
4 projected geometry literal stored in the database.
5 (bug #71:
7 * Now, geometries expressed in CRS84 and a `geo:wktLiteral' datatype
8 are assigned the correct CRS, i.e., EPSG:4326 with a longitude
9 latitude axis order.
11 * Now, we report a parse error when a constant geometry given in a
12 SELECT or HAVING clause is not well-formed according to the WKT
13 specification.
14 (bug #69:
16 * Function `geof:convexHull' is now supported in a Having clause.
18 * Fixed older implementation of `strdf:distance' that would expect two
19 arguments instead of three when present in a HAVING clause.
21 * Fixed a bug that would cause a class cast exception for grounded
22 expressions with function nesting in the SELECT or HAVING clause.
24 * Fixed a bug in which `postgis:ST_Centroid' did not work in the SELECT
25 clause with input geometries from the database.
27 * Fixed a bug that `geof:getSRID' would return an integer instead of a
28 the URI corrresponding to the CRS that the input geometry was
29 expressed.
30 (bug #32:
31 * Fixed a bug that would raise an exception for queries involving two
32 UNION graph patterns and a projection to a predicate or a URI in
33 general.
34 (bug #53:
36 Wed Sep 17 20:14:12 2014 Pyravlos Team
38 * Version 3.2.10 released.
40 * The test suite of Strabon has now reached a mature level. It
41 contains tests for both stSPARQL and GeoSPARQL query languages and
42 most of the compliance tests covered in the specification of
43 GeoSPARQL (well, only those tests for the components that we have
44 chosen to implement).
46 * The endpoint now parses Accept headers with multiple values and uses
47 the first mimetype corresponding to a valid stSPARQLQueryResultFormat.
48 (bug #64:
50 * The endpoint now registers a handler for SIGTERM signals, so that if
51 it is run from the command-line (endpoint-exec), then the closing of
52 the connection will be ultimately called.
53 (bug #40:
55 * Strabon goes debian v1. the endpoint-exec jar is now given in a .deb
56 format. By dpkg-ing it, one can run a stand alone strabon endpoint
57 locally.
58 (bug #45
60 * Fixed a bug in which Strabon hanged when a unary spatial construct
61 had a ternary spatial construct as argument.
62 (bug #45
64 * Fixed a bug according to which spatial functions in ORDER BY were not
65 evaluated at all.
66 (bug #62:
68 * Fixed a bug according to which spatial boolean functions appearing
69 in the SELECT clause were raising a NULL pointer exception.
70 (bug #34:
72 * Fixed a bug in queries that contain variables that exist inside
73 spatial functions in select and do not exist in the where clause
74 made Strabon throw a NULL pointer exception.
75 (bug #51
77 * Various changes in the interface and behavior of Strabon Endpoint:
78 - Revised the logos and the sample queries.
79 - Results query limit is set to zero (unlimited).
80 - Users can now store RDF data that is present in a file on the
81 client side (the file is uploaded to the server).
82 - Credentials are now required for uploading files or executing
83 UPDATE queries, unless Strabon Endpoint runs locally (localhost).
84 - When viewing the results of queries in HTML, any URI is now an
85 active link to itself. Previously, that URI was being DESCRIBEd
86 and one was being transferred to a page viewing the result of the
87 DESCRIBE query.
88 - The DESCRIBE functionality can now be accessed through the menu bar.
90 * Fixed a bug where strdf:intersection function did not work as an
91 aggregate when used without 'GROUP BY'.
92 (bug #46
95 Sat Oct 19 23:37:23 2013 Pyravlos Team
97 * Version 3.2.9 released.
99 * Added support for the following google chart types: PieChart,
100 AreaChart and ColumnChart to strabon endpoint.
102 * Added Timemap as new results format in Strabon endpoint. This
103 option displays results in a map and a timeline on the same time,
104 using the Timemap js library (
105 The KMLWriter has been extended for that purpose, by transforming
106 dateTime values that are included in the result set into the respective
107 TimeStamp KML primitive (
108 In the "temporals" branch, the values of the strdf:period datatype
109 are converted into the respective KML TimeSpan primitive.
111 * Added extension function <> which is
112 mapped to the ST_Centroid(geometry) extension function of PostGIS.
113 See also: <>.
115 * Added extension function <> which is
116 mapped to the ST_MakeLine(geometry, geometry) extension function of
117 PostGIS. See also: <>.
119 * Added PostGIS vocabulary class.
121 * Added support of all SPARQL result types provided by Sesame (json,
122 xml, csv, tsv, binary). To get the respective writer, just prepend the
123 string "SPARQL/", e.g., "SPARQL/JSON". This is to ensure that we
124 support all SPARQL result formats of the SPARQL Protocol.
126 * Fixed a bug where a non-implemented extension function would make
127 Strabon throw a NULL pointer exception. Now we get away with it
128 through a warning.
130 * Strabon endpoint now publishes the URIs of the supported units of
131 measure for use in strdf:distance and geof:distance functions of
132 stSPARQL and GeoSPARQL, respectively. The URIs are those defined by
133 OGC Units of Measure 1.0 specification which may be found at
134 Strabon endpoint publishes
135 the URIs at http://localhost:8080/endpoint/Capabilities.
137 * Created new module with name 'vocab` and artifactId
138 'strabon-vocabulary` and moved there. Other
139 vocabularies have been added as well, such as Simple Features, and
140 GeoSPARQL.
142 * Strabon endpoint now publishes the URIs of the supported extension
143 functions for stSPARQL and GeoSPARQL. One should access them by
144 hitting the link http://localhost:8080/endpoint/Capabilities.
146 * Support for parsing EPSG URIs in geometry literals with datatype
147 geo:wktLiteral.
148 (bug #33:
150 * Endpoint Client now supports querying of Virtuoso and Parliament endpoints.
152 * Endpoint Client now supports store and update operations, but only
153 for Strabon Endpoints.
155 *Modified the NQUADSTranslator so that the rewritten triples are
156 immediately flushed to the database once they are created.
158 *In the N-Quads format, the fourth element is *optional*. Made proper
159 modification to the storage manager to coply to the specification
160 described here: Now files in
161 NQUADS format can contain quads *or* triples in order to be stored
162 successfully in Strabon.
164 *Fixed bug that occurs when storing periods having "UC" as ending
165 point.
167 *Added an initial set of tests on temporal operations in the
168 testsuite module.
170 *Completed support for temporal updates
172 *Moved vocabulary related to the temporal features of Strabon to the
173 respective "vocabulary" project
175 *The evaluation of temporal joins in the database does not produce
176 cartesian products in the database
178 * GeoSPARQL functions sfCrosses, sfOverlaps, ehOverlaps do not use the
179 ST_Relate PostGIS function (bug #24:
181 * All Simple Features functions of GeoSPARQL do not use the ST_Relate
182 PostGIS function
184 * Added diffTime function. This function performs the difference
185 between two literals of xsd:time datatype and returns a literal of
186 the xsd:time datatype as well.
188 * Added a testsuite package in default branch. Full tester guide can be found
189 in README. Among other, most of GeoSPARQL compliance tests
190 (, pg. 53) have been
191 implemented.
193 * Changed the definition and implementation of strdf:distance function, by
194 adopting the definition of GeoSPARQL.
195 (bug #23:
197 * Changed the definition and implementation of strdf:buffer function, by
198 adopting the definition of GeoSPARQL.
199 (bug #35:
201 * Added geof:distance and geof:buffer functions, which have the same definition
202 with strdf:distance and strdf:buffer respectively.
203 (bug #32:
205 * Added a download button when performing describe and construct queries at the
206 endpoint.
207 (bug #38:
209 * Fixed a bug, where XMLWriter and TSVWriter did not return geometries with the
210 SRID.
211 (bug #47:
213 * Fixed a bug where the GeoSPARQL construct functions did not return the datatype
214 geo:wktLiteral datatype but strdf:WKT.
216 Tue Mar 26 13:28:26 2013 Pyravlos Team
218 * Version 3.2.8 released.
220 * Added support for handling (storing/querying) GeoSPARQL datatypes.
221 (bug #31:
223 * Fixed a bug in StoreOp that wouldn't close the connection, neither
224 rollback the transaction upon an exception. This had as a side effect
225 the abnormal termination of StoreOp (through for example the use of
226 Ctrl-C signal) which was leaving the database locked.
228 * Fixed bug where spatial aggregates (e.g., union) didn't work as
229 expected when the query didn't contain a `GROUP BY' clause.
230 (bug #22:
232 * Updated GeoSPARQL namespaces and fixed function names to comply with
233 the GeoSPARQL specification.
234 (bug #25:
236 *Added preliminary tests on temporal functions in the respective
237 "test" package of the runtime module.
239 *Added option to strabon and endpoint scripts to support storing
240 files in NQUADS format.
242 *When a large file in NQUADS format is going to be stored, it is
243 partitioned and stored in parts. This happens because the translation
244 of quads to triples is a memory intensive job, so, translating and
245 storing the file in batches increases performance.
248 Wed Jan 09 18:06:41 2013 Pyravlos Team
250 * Version 3.2.7 released.
252 * Add an extension function
253 <> for computing the
254 span (in milliseconds) between two timestamps.
256 * Added an <endpoint-exec> module. This module builds an executable jar file
257 with an embedded Apache Tomcat 7. To create and run the executable jar just
258 type:
259 $ mvn clean package
260 $ java -jar endpoint-exec/target/strabon-endpoint-executable-*.jar
262 * Modified strabon script and postgis/monetdb.StoreOP class to get an
263 option for storing a RDF file in a named graph. Moreover, the RDF
264 format of the input RDF file now is given as an option (still, if it
265 is missing, it is assumed that the input is in N-TRIPLES format). The
266 option for the format is -f and the option for the named graph is -g
267 (takes a URI as an argument).
269 * Modified the names of the stSPARQL extension functions that
270 utilize the minimum bounding boxes of the involved geometries.
272 *Fixed bug in the evaluation of temporal constructs.
274 *Fixed a major bug that occured when a temporal variable that also took part
275 in a temporal join was projected.
277 *Renamed temporal extension functions to comply with the respective
278 functions of Allen's temporal relations.
280 *Modified the implementation of the temporal relation functions
281 "meets", "starts", "finishes", to comply with the semantics of the
282 respective functions of Allen. These functions are not supported by
283 PostgreSQL Temporal, so, in order to be evaluated in the database
284 level, we implemented them as PostgreSQL extension functions.
285 ATTENTION: In order to use these functions, the respective sql script
286 that includes them should be loaded to the the temporally (and spa-
287 tially) enabled database.
290 Tue Dec 11 19:33:45 2012 Pyravlos Team
292 * Version 3.2.6 released.
294 * Modified the names of the stSPARQL extension functions to comply
295 with the OGC Simple Features Access standard.
297 Tue Dec 11 00:11:43 2012 Pyravlos Team
299 * Version 3.2.5 released.
301 * Added support for storing and querying temporal information.
302 This functionality may be found in the `temporals' branch.
304 *The datatypes <> and
305 <> are used to
306 represent periods and instants respectively.
308 *The valid time time of triples is represented using quadtruples,
309 with the valid time annotation(instant or period) being the
310 fourth element of the quad. Into this direction:
311 *Strabon has been extended to support the NQUADS format. The
312 respective Sesame packages (of version 2.6.9) that support
313 this format are used.
315 *NQuadTranslator class has been created. This class uses the
316 NQUADS parser which is available here:
317 The initial version of this parser did not include support
318 for literals as the fourth element of the quad. We exteded
319 it to support the valid time representations described above.
321 *The NQUADSTranslator translates quads into triples using the
322 named graph approach, similar to the one proposed by Tappolet
323 et al. and described in
325 *The rdbms level of Strabon has been extended to (i) support
326 tha period datatype (ii) store the period values in the table
327 period_values(id, period). The period column is of the period
328 datatype, offered by the PostgreSQL Temporal extension (
329 Also, a GiST index is created on this column.
331 *A rewriting mechanism that converts quad graph patterns into
332 triple partners using the named graphs approach has been
333 implemented as a method of the runtime.generaldb.Strabon
334 class.
336 *A big part of the temporal functions of stSPARQL has been
337 imlemented. These functions include:
338 *The temporal relation functions during, periodOverlaps,
339 equalsPeriod, nequalsPeriod, adjacent, before, after,
340 overleft, overright, meets, starts, finishes.
342 *The period constructors period_intersect, period_union,
343 preceding_period, and succeeding_period. The last two
344 constructors are implemented using the jtemporal library.
345 The other functions are implemented in the database,
346 being mapped into the respective functions of PostgreSQL
347 Temporal. A complete reference of PostgreSQL Temporal
348 can be found here:
350 *The temporal constants "NOW" and "UC" (Until Changed)
351 are supported.
353 *The vocabulary of the valid time dimension of stSPARQL can
354 be found at the TemporalConstants class of the evaluation
355 module.
357 * Changed behaviour of Strabon and Strabon Endpoint for connecting to
358 a spatially-enabled database. Only one instance of Strabon is allowed
359 at a time.
361 * Implemented a Java client for Strabon Endpoint. The client should be
362 used only with endpoint versions >=3.2.5. The implementation may be
363 found int the `endpoint-client' submodule of maven. Currently, only
364 querying of Strabon Endpoints is supported.
366 * Added support for requesting the capabilities of Strabon Endpoint
367 (fixes Bug #20 <>). See
368 changesets f840796400bf and ?<TBC>? for specific details and how you
369 can determine the capabilities of older endpoints (versions <= 3.2.4).
371 * Updated KML writer to include the projected variables of an stSPARQL
372 query in "ExtendedData" and "Data" tags. This is the proper way to
373 do it if we need to convert a KML to a ESRI shapefile and also include
374 such information as attributes for a feature. See related pages from
375 KML specification:
376 <>
377 <>
379 * Added user authentication for storing RDF data through Strabon
380 Endpoint. The credentials are specified in
381 WEB-INF/ file.
383 * Strabon Endpoints now limits the number of the results to a maximum
384 one. The maximum number is specified in the beans.xml file. This
385 corresponds to parameter "maxLimit". The endpoint script has also been
386 updated correspondingly; the limit can be given using the option "-l".
387 One can disable limiting of query results, by setting the "maxLimit"
388 parameter to 0. Addresses Bug #6
389 (<>).
391 * Added "Known Issues" section to README.
393 * Added -m (more memory) and -M (much more memory) options in strabon
394 script for out-of-memory exceptions.
396 * Fixed Bug #10 (<>). Now
397 KMLWriter handles more geometric types (other than polygons). See
398 changeset 9a3bfee64a39.
400 * Menu and navigation in Strabon Endpoint has changed to use jquery.
401 The menu is now populated using the queries placed inside the beans.xml.
403 * Added BrowseBean and browse.jsp for browsing the RDF data using the
404 Strabon Endpoint.