view ChangeLog @ 1353:d9fea69a4b30

clean up the repositories
author Kostis Kyzirakos <>
date Wed Sep 10 12:37:29 2014 +0200 (2014-09-10)
parents edc19e1061da e5abd174045f
children 5b6b65340693
line source
1 * Fixed a bug that occured when storing quads from endpoint.
3 * Version 3.2.10 released.
5 * Various changes in the interface and behavior of Strabon Endpoint:
6 - Revised the logos and the sample queries.
7 - Results query limit is set to zero (unlimited).
8 - Users can now store RDF data that is present in a file on the
9 client side (the file is uploaded to the server).
10 - Credentials are now required for uploading files or executing
11 UPDATE queries, unless Strabon Endpoint runs locally (localhost).
12 - When viewing the results of queries in HTML, any URI is now an
13 active link to itself. Previously, that URI was being DESCRIBEd
14 and one was being transferred to a page viewing the result of the
15 DESCRIBE query.
16 - The DESCRIBE functionality can now be accessed through the menu bar.
18 * Fixed a bug where strdf:intersection function did not work as an
19 aggregate when used without 'GROUP BY'.
20 (bug #46
22 Sat Oct 19 23:37:23 2013 Pyravlos Team
24 * Version 3.2.9 released.
26 * Added support for the following google chart types: PieChart,
27 AreaChart and ColumnChart to strabon endpoint.
29 * Added Timemap as new results format in Strabon endpoint. This
30 option displays results in a map and a timeline on the same time,
31 using the Timemap js library (
32 The KMLWriter has been extended for that purpose, by transforming
33 dateTime values that are included in the result set into the respective
34 TimeStamp KML primitive (
35 In the "temporals" branch, the values of the strdf:period datatype
36 are converted into the respective KML TimeSpan primitive.
38 * Added extension function <> which is
39 mapped to the ST_Centroid(geometry) extension function of PostGIS.
40 See also: <>.
42 * Added extension function <> which is
43 mapped to the ST_MakeLine(geometry, geometry) extension function of
44 PostGIS. See also: <>.
46 * Added PostGIS vocabulary class.
48 * Added support of all SPARQL result types provided by Sesame (json,
49 xml, csv, tsv, binary). To get the respective writer, just prepend the
50 string "SPARQL/", e.g., "SPARQL/JSON". This is to ensure that we
51 support all SPARQL result formats of the SPARQL Protocol.
53 * Fixed a bug where a non-implemented extension function would make
54 Strabon throw a NULL pointer exception. Now we get away with it
55 through a warning.
57 * Strabon endpoint now publishes the URIs of the supported units of
58 measure for use in strdf:distance and geof:distance functions of
59 stSPARQL and GeoSPARQL, respectively. The URIs are those defined by
60 OGC Units of Measure 1.0 specification which may be found at
61 Strabon endpoint publishes
62 the URIs at http://localhost:8080/endpoint/Capabilities.
64 * Created new module with name 'vocab` and artifactId
65 'strabon-vocabulary` and moved there. Other
66 vocabularies have been added as well, such as Simple Features, and
69 * Strabon endpoint now publishes the URIs of the supported extension
70 functions for stSPARQL and GeoSPARQL. One should access them by
71 hitting the link http://localhost:8080/endpoint/Capabilities.
73 * Support for parsing EPSG URIs in geometry literals with datatype
74 geo:wktLiteral.
75 (bug #33:
77 * Endpoint Client now supports querying of Virtuoso and Parliament endpoints.
79 * Endpoint Client now supports store and update operations, but only
80 for Strabon Endpoints.
82 *Modified the NQUADSTranslator so that the rewritten triples are
83 immediately flushed to the database once they are created.
85 *In the N-Quads format, the fourth element is *optional*. Made proper
86 modification to the storage manager to coply to the specification
87 described here: Now files in
88 NQUADS format can contain quads *or* triples in order to be stored
89 successfully in Strabon.
91 *Fixed bug that occurs when storing periods having "UC" as ending
92 point.
94 *Added an initial set of tests on temporal operations in the
95 testsuite module.
97 *Completed support for temporal updates
99 *Moved vocabulary related to the temporal features of Strabon to the
100 respective "vocabulary" project
102 *The evaluation of temporal joins in the database does not produce
103 cartesian products in the database
105 * GeoSPARQL functions sfCrosses, sfOverlaps, ehOverlaps do not use the
106 ST_Relate PostGIS function (bug #24:
108 * All Simple Features functions of GeoSPARQL do not use the ST_Relate
109 PostGIS function
111 * Added diffTime function. This function performs the difference
112 between two literals of xsd:time datatype and returns a literal of
113 the xsd:time datatype as well.
115 * Added a testsuite package in default branch. Full tester guide can be found
116 in README. Among other, most of GeoSPARQL compliance tests
117 (, pg. 53) have been
118 implemented.
120 * Changed the definition and implementation of strdf:distance function, by
121 adopting the definition of GeoSPARQL.
122 (bug #23:
124 * Changed the definition and implementation of strdf:buffer function, by
125 adopting the definition of GeoSPARQL.
126 (bug #35:
128 * Added geof:distance and geof:buffer functions, which have the same definition
129 with strdf:distance and strdf:buffer respectively.
130 (bug #32:
132 * Added a download button when performing describe and construct queries at the
133 endpoint.
134 (bug #38:
136 * Fixed a bug, where XMLWriter and TSVWriter did not return geometries with the
137 SRID.
138 (bug #47:
140 * Fixed a bug where the GeoSPARQL construct functions did not return the datatype
141 geo:wktLiteral datatype but strdf:WKT.
143 Tue Mar 26 13:28:26 2013 Pyravlos Team
145 * Version 3.2.8 released.
147 * Added support for handling (storing/querying) GeoSPARQL datatypes.
148 (bug #31:
150 * Fixed a bug in StoreOp that wouldn't close the connection, neither
151 rollback the transaction upon an exception. This had as a side effect
152 the abnormal termination of StoreOp (through for example the use of
153 Ctrl-C signal) which was leaving the database locked.
155 * Fixed bug where spatial aggregates (e.g., union) didn't work as
156 expected when the query didn't contain a `GROUP BY' clause.
157 (bug #22:
159 * Updated GeoSPARQL namespaces and fixed function names to comply with
160 the GeoSPARQL specification.
161 (bug #25:
163 *Added preliminary tests on temporal functions in the respective
164 "test" package of the runtime module.
166 *Added option to strabon and endpoint scripts to support storing
167 files in NQUADS format.
169 *When a large file in NQUADS format is going to be stored, it is
170 partitioned and stored in parts. This happens because the translation
171 of quads to triples is a memory intensive job, so, translating and
172 storing the file in batches increases performance.
175 Wed Jan 09 18:06:41 2013 Pyravlos Team
177 * Version 3.2.7 released.
179 * Add an extension function
180 <> for computing the
181 span (in milliseconds) between two timestamps.
183 * Added an <endpoint-exec> module. This module builds an executable jar file
184 with an embedded Apache Tomcat 7. To create and run the executable jar just
185 type:
186 $ mvn clean package
187 $ java -jar endpoint-exec/target/strabon-endpoint-executable-*.jar
189 * Modified strabon script and postgis/monetdb.StoreOP class to get an
190 option for storing a RDF file in a named graph. Moreover, the RDF
191 format of the input RDF file now is given as an option (still, if it
192 is missing, it is assumed that the input is in N-TRIPLES format). The
193 option for the format is -f and the option for the named graph is -g
194 (takes a URI as an argument).
196 * Modified the names of the stSPARQL extension functions that
197 utilize the minimum bounding boxes of the involved geometries.
199 *Fixed bug in the evaluation of temporal constructs.
201 *Fixed a major bug that occured when a temporal variable that also took part
202 in a temporal join was projected.
204 *Renamed temporal extension functions to comply with the respective
205 functions of Allen's temporal relations.
207 *Modified the implementation of the temporal relation functions
208 "meets", "starts", "finishes", to comply with the semantics of the
209 respective functions of Allen. These functions are not supported by
210 PostgreSQL Temporal, so, in order to be evaluated in the database
211 level, we implemented them as PostgreSQL extension functions.
212 ATTENTION: In order to use these functions, the respective sql script
213 that includes them should be loaded to the the temporally (and spa-
214 tially) enabled database.
217 Tue Dec 11 19:33:45 2012 Pyravlos Team
219 * Version 3.2.6 released.
221 * Modified the names of the stSPARQL extension functions to comply
222 with the OGC Simple Features Access standard.
224 Tue Dec 11 00:11:43 2012 Pyravlos Team
226 * Version 3.2.5 released.
228 * Added support for storing and querying temporal information.
229 This functionality may be found in the `temporals' branch.
231 *The datatypes <> and
232 <> are used to
233 represent periods and instants respectively.
235 *The valid time time of triples is represented using quadtruples,
236 with the valid time annotation(instant or period) being the
237 fourth element of the quad. Into this direction:
238 *Strabon has been extended to support the NQUADS format. The
239 respective Sesame packages (of version 2.6.9) that support
240 this format are used.
242 *NQuadTranslator class has been created. This class uses the
243 NQUADS parser which is available here:
244 The initial version of this parser did not include support
245 for literals as the fourth element of the quad. We exteded
246 it to support the valid time representations described above.
248 *The NQUADSTranslator translates quads into triples using the
249 named graph approach, similar to the one proposed by Tappolet
250 et al. and described in
252 *The rdbms level of Strabon has been extended to (i) support
253 tha period datatype (ii) store the period values in the table
254 period_values(id, period). The period column is of the period
255 datatype, offered by the PostgreSQL Temporal extension (
256 Also, a GiST index is created on this column.
258 *A rewriting mechanism that converts quad graph patterns into
259 triple partners using the named graphs approach has been
260 implemented as a method of the runtime.generaldb.Strabon
261 class.
263 *A big part of the temporal functions of stSPARQL has been
264 imlemented. These functions include:
265 *The temporal relation functions during, periodOverlaps,
266 equalsPeriod, nequalsPeriod, adjacent, before, after,
267 overleft, overright, meets, starts, finishes.
269 *The period constructors period_intersect, period_union,
270 preceding_period, and succeeding_period. The last two
271 constructors are implemented using the jtemporal library.
272 The other functions are implemented in the database,
273 being mapped into the respective functions of PostgreSQL
274 Temporal. A complete reference of PostgreSQL Temporal
275 can be found here:
277 *The temporal constants "NOW" and "UC" (Until Changed)
278 are supported.
280 *The vocabulary of the valid time dimension of stSPARQL can
281 be found at the TemporalConstants class of the evaluation
282 module.
284 * Changed behaviour of Strabon and Strabon Endpoint for connecting to
285 a spatially-enabled database. Only one instance of Strabon is allowed
286 at a time.
288 * Implemented a Java client for Strabon Endpoint. The client should be
289 used only with endpoint versions >=3.2.5. The implementation may be
290 found int the `endpoint-client' submodule of maven. Currently, only
291 querying of Strabon Endpoints is supported.
293 * Added support for requesting the capabilities of Strabon Endpoint
294 (fixes Bug #20 <>). See
295 changesets f840796400bf and ?<TBC>? for specific details and how you
296 can determine the capabilities of older endpoints (versions <= 3.2.4).
298 * Updated KML writer to include the projected variables of an stSPARQL
299 query in "ExtendedData" and "Data" tags. This is the proper way to
300 do it if we need to convert a KML to a ESRI shapefile and also include
301 such information as attributes for a feature. See related pages from
302 KML specification:
303 <>
304 <>
306 * Added user authentication for storing RDF data through Strabon
307 Endpoint. The credentials are specified in
308 WEB-INF/ file.
310 * Strabon Endpoints now limits the number of the results to a maximum
311 one. The maximum number is specified in the beans.xml file. This
312 corresponds to parameter "maxLimit". The endpoint script has also been
313 updated correspondingly; the limit can be given using the option "-l".
314 One can disable limiting of query results, by setting the "maxLimit"
315 parameter to 0. Addresses Bug #6
316 (<>).
318 * Added "Known Issues" section to README.
320 * Added -m (more memory) and -M (much more memory) options in strabon
321 script for out-of-memory exceptions.
323 * Fixed Bug #10 (<>). Now
324 KMLWriter handles more geometric types (other than polygons). See
325 changeset 9a3bfee64a39.
327 * Menu and navigation in Strabon Endpoint has changed to use jquery.
328 The menu is now populated using the queries placed inside the beans.xml.
330 * Added BrowseBean and browse.jsp for browsing the RDF data using the
331 Strabon Endpoint.