view ChangeLog @ 1292:c41e1b102dd3

updated ChangeLog
author Konstantina Bereta <>
date Sun Oct 20 21:25:28 2013 +0300 (2013-10-20)
parents da14a303bf2c
children edc19e1061da
line source
1 Sun Oct 20 20:23:14 2013 Pyravlos Team
3 * Version 3.2.9 released.
5 * Added support for the following google chart types: PieChart,
6 AreaChart and ColumnChart to strabon endpoint.
8 * Added extension function <> which is
9 mapped to the ST_Centroid(geometry) extension function of PostGIS.
10 See also: <>.
12 * Added extension function <> which is
13 mapped to the ST_MakeLine(geometry, geometry) extension function of
14 PostGIS. See also: <>.
16 * Added PostGIS vocabulary class.
18 * Added support of all SPARQL result types provided by Sesame (json,
19 xml, csv, tsv, binary). To get the respective writer, just prepend the
20 string "SPARQL/", e.g., "SPARQL/JSON". This is to ensure that we
21 support all SPARQL result formats of the SPARQL Protocol.
23 * Fixed a bug where a non-implemented extension function would make
24 Strabon throw a NULL pointer exception. Now we get away with it
25 through a warning.
27 * Strabon endpoint now publishes the URIs of the supported units of
28 measure for use in strdf:distance and geof:distance functions of
29 stSPARQL and GeoSPARQL, respectively. The URIs are those defined by
30 OGC Units of Measure 1.0 specification which may be found at
31 Strabon endpoint publishes
32 the URIs at http://localhost:8080/endpoint/Capabilities.
34 * Created new module with name 'vocab` and artifactId
35 'strabon-vocabulary` and moved there. Other
36 vocabularies have been added as well, such as Simple Features, and
39 * Strabon endpoint now publishes the URIs of the supported extension
40 functions for stSPARQL and GeoSPARQL. One should access them by
41 hitting the link http://localhost:8080/endpoint/Capabilities.
43 * Support for parsing EPSG URIs in geometry literals with datatype
44 geo:wktLiteral.
45 (bug #33:
47 *Modified the NQUADSTranslator so that the rewritten triples are
48 immediately flushed to the database once they are created.
50 *In the N-Quads format, the fourth element is *optional*. Made proper
51 modification to the storage manager to coply to the specification
52 described here: Now files in
53 NQUADS format can contain quads *or* triples in order to be stored
54 successfully in Strabon.
56 *Fixed bug that occurs when storing periods having "UC" as ending
57 point.
59 *Added an initial set of tests on temporal operations in the
60 testsuite module.
62 *Completed support for temporal updates
64 *Moved vocabulary related to the temporal features of Strabon to the
65 respective "vocabulary" project
67 *The evaluation of temporal joins in the database does not produce
68 cartesian products in the database
70 * GeoSPARQL functions sfCrosses, sfOverlaps, ehOverlaps do not use the
71 ST_Relate PostGIS function (bug #24:
73 * All Simple Features functions of GeoSPARQL do not use the ST_Relate
74 PostGIS function
76 * Added diffTime function. This function performs the difference
77 between two literals of xsd:time datatype and returns a literal of
78 the xsd:time datatype as well.
80 * Added a testsuite package in default branch. Full tester guide can be found
81 in README. Among other, most of GeoSPARQL compliance tests
82 (, pg. 53) have been
83 implemented.
85 Tue Mar 26 13:28:26 2013 Pyravlos Team
87 * Version 3.2.8 released.
89 * Added support for handling (storing/querying) GeoSPARQL datatypes.
90 (bug #31:
92 * Fixed a bug in StoreOp that wouldn't close the connection, neither
93 rollback the transaction upon an exception. This had as a side effect
94 the abnormal termination of StoreOp (through for example the use of
95 Ctrl-C signal) which was leaving the database locked.
97 * Fixed bug where spatial aggregates (e.g., union) didn't work as
98 expected when the query didn't contain a `GROUP BY' clause.
99 (bug #22:
101 * Updated GeoSPARQL namespaces and fixed function names to comply with
102 the GeoSPARQL specification.
103 (bug #25:
105 *Added preliminary tests on temporal functions in the respective
106 "test" package of the runtime module.
108 *Added option to strabon and endpoint scripts to support storing
109 files in NQUADS format.
111 *When a large file in NQUADS format is going to be stored, it is
112 partitioned and stored in parts. This happens because the translation
113 of quads to triples is a memory intensive job, so, translating and
114 storing the file in batches increases performance.
117 Wed Jan 09 18:06:41 2013 Pyravlos Team
119 * Version 3.2.7 released.
121 * Add an extension function
122 <> for computing the
123 span (in milliseconds) between two timestamps.
125 * Added an <endpoint-exec> module. This module builds an executable jar file
126 with an embedded Apache Tomcat 7. To create and run the executable jar just
127 type:
128 $ mvn clean package
129 $ java -jar endpoint-exec/target/strabon-endpoint-executable-*.jar
131 * Modified strabon script and postgis/monetdb.StoreOP class to get an
132 option for storing a RDF file in a named graph. Moreover, the RDF
133 format of the input RDF file now is given as an option (still, if it
134 is missing, it is assumed that the input is in N-TRIPLES format). The
135 option for the format is -f and the option for the named graph is -g
136 (takes a URI as an argument).
138 * Modified the names of the stSPARQL extension functions that
139 utilize the minimum bounding boxes of the involved geometries.
141 *Fixed bug in the evaluation of temporal constructs.
143 *Fixed a major bug that occured when a temporal variable that also took part
144 in a temporal join was projected.
146 *Renamed temporal extension functions to comply with the respective
147 functions of Allen's temporal relations.
149 *Modified the implementation of the temporal relation functions
150 "meets", "starts", "finishes", to comply with the semantics of the
151 respective functions of Allen. These functions are not supported by
152 PostgreSQL Temporal, so, in order to be evaluated in the database
153 level, we implemented them as PostgreSQL extension functions.
154 ATTENTION: In order to use these functions, the respective sql script
155 that includes them should be loaded to the the temporally (and spa-
156 tially) enabled database.
159 Tue Dec 11 19:33:45 2012 Pyravlos Team
161 * Version 3.2.6 released.
163 * Modified the names of the stSPARQL extension functions to comply
164 with the OGC Simple Features Access standard.
166 Tue Dec 11 00:11:43 2012 Pyravlos Team
168 * Version 3.2.5 released.
170 * Added support for storing and querying temporal information.
171 This functionality may be found in the `temporals' branch.
173 *The datatypes <> and
174 <> are used to
175 represent periods and instants respectively.
177 *The valid time time of triples is represented using quadtruples,
178 with the valid time annotation(instant or period) being the
179 fourth element of the quad. Into this direction:
180 *Strabon has been extended to support the NQUADS format. The
181 respective Sesame packages (of version 2.6.9) that support
182 this format are used.
184 *NQuadTranslator class has been created. This class uses the
185 NQUADS parser which is available here:
186 The initial version of this parser did not include support
187 for literals as the fourth element of the quad. We exteded
188 it to support the valid time representations described above.
190 *The NQUADSTranslator translates quads into triples using the
191 named graph approach, similar to the one proposed by Tappolet
192 et al. and described in
194 *The rdbms level of Strabon has been extended to (i) support
195 tha period datatype (ii) store the period values in the table
196 period_values(id, period). The period column is of the period
197 datatype, offered by the PostgreSQL Temporal extension (
198 Also, a GiST index is created on this column.
200 *A rewriting mechanism that converts quad graph patterns into
201 triple partners using the named graphs approach has been
202 implemented as a method of the runtime.generaldb.Strabon
203 class.
205 *A big part of the temporal functions of stSPARQL has been
206 imlemented. These functions include:
207 *The temporal relation functions during, periodOverlaps,
208 equalsPeriod, nequalsPeriod, adjacent, before, after,
209 overleft, overright, meets, starts, finishes.
211 *The period constructors period_intersect, period_union,
212 preceding_period, and succeeding_period. The last two
213 constructors are implemented using the jtemporal library.
214 The other functions are implemented in the database,
215 being mapped into the respective functions of PostgreSQL
216 Temporal. A complete reference of PostgreSQL Temporal
217 can be found here:
219 *The temporal constants "NOW" and "UC" (Until Changed)
220 are supported.
222 *The vocabulary of the valid time dimension of stSPARQL can
223 be found at the TemporalConstants class of the evaluation
224 module.
226 * Changed behaviour of Strabon and Strabon Endpoint for connecting to
227 a spatially-enabled database. Only one instance of Strabon is allowed
228 at a time.
230 * Implemented a Java client for Strabon Endpoint. The client should be
231 used only with endpoint versions >=3.2.5. The implementation may be
232 found int the `endpoint-client' submodule of maven. Currently, only
233 querying of Strabon Endpoints is supported.
235 * Added support for requesting the capabilities of Strabon Endpoint
236 (fixes Bug #20 <>). See
237 changesets f840796400bf and ?<TBC>? for specific details and how you
238 can determine the capabilities of older endpoints (versions <= 3.2.4).
240 * Updated KML writer to include the projected variables of an stSPARQL
241 query in "ExtendedData" and "Data" tags. This is the proper way to
242 do it if we need to convert a KML to a ESRI shapefile and also include
243 such information as attributes for a feature. See related pages from
244 KML specification:
245 <>
246 <>
248 * Added user authentication for storing RDF data through Strabon
249 Endpoint. The credentials are specified in
250 WEB-INF/ file.
252 * Strabon Endpoints now limits the number of the results to a maximum
253 one. The maximum number is specified in the beans.xml file. This
254 corresponds to parameter "maxLimit". The endpoint script has also been
255 updated correspondingly; the limit can be given using the option "-l".
256 One can disable limiting of query results, by setting the "maxLimit"
257 parameter to 0. Addresses Bug #6
258 (<>).
260 * Added "Known Issues" section to README.
262 * Added -m (more memory) and -M (much more memory) options in strabon
263 script for out-of-memory exceptions.
265 * Fixed Bug #10 (<>). Now
266 KMLWriter handles more geometric types (other than polygons). See
267 changeset 9a3bfee64a39.
269 * Menu and navigation in Strabon Endpoint has changed to use jquery.
270 The menu is now populated using the queries placed inside the beans.xml.
272 * Added BrowseBean and browse.jsp for browsing the RDF data using the
273 Strabon Endpoint.