view ChangeLog @ 1305:edc19e1061da

Updated Changelog.
author Panayiotis Smeros <>
date Wed Dec 11 17:19:09 2013 +0200 (2013-12-11)
parents c41e1b102dd3
children 4dff2f1163d8
line source
1 * Fixed a bug that occured when storing quads from endpoint.
3 Sun Oct 20 20:23:14 2013 Pyravlos Team
5 * Version 3.2.9 released.
7 * Added support for the following google chart types: PieChart,
8 AreaChart and ColumnChart to strabon endpoint.
10 * Added extension function <> which is
11 mapped to the ST_Centroid(geometry) extension function of PostGIS.
12 See also: <>.
14 * Added extension function <> which is
15 mapped to the ST_MakeLine(geometry, geometry) extension function of
16 PostGIS. See also: <>.
18 * Added PostGIS vocabulary class.
20 * Added support of all SPARQL result types provided by Sesame (json,
21 xml, csv, tsv, binary). To get the respective writer, just prepend the
22 string "SPARQL/", e.g., "SPARQL/JSON". This is to ensure that we
23 support all SPARQL result formats of the SPARQL Protocol.
25 * Fixed a bug where a non-implemented extension function would make
26 Strabon throw a NULL pointer exception. Now we get away with it
27 through a warning.
29 * Strabon endpoint now publishes the URIs of the supported units of
30 measure for use in strdf:distance and geof:distance functions of
31 stSPARQL and GeoSPARQL, respectively. The URIs are those defined by
32 OGC Units of Measure 1.0 specification which may be found at
33 Strabon endpoint publishes
34 the URIs at http://localhost:8080/endpoint/Capabilities.
36 * Created new module with name 'vocab` and artifactId
37 'strabon-vocabulary` and moved there. Other
38 vocabularies have been added as well, such as Simple Features, and
41 * Strabon endpoint now publishes the URIs of the supported extension
42 functions for stSPARQL and GeoSPARQL. One should access them by
43 hitting the link http://localhost:8080/endpoint/Capabilities.
45 * Support for parsing EPSG URIs in geometry literals with datatype
46 geo:wktLiteral.
47 (bug #33:
49 *Modified the NQUADSTranslator so that the rewritten triples are
50 immediately flushed to the database once they are created.
52 *In the N-Quads format, the fourth element is *optional*. Made proper
53 modification to the storage manager to coply to the specification
54 described here: Now files in
55 NQUADS format can contain quads *or* triples in order to be stored
56 successfully in Strabon.
58 *Fixed bug that occurs when storing periods having "UC" as ending
59 point.
61 *Added an initial set of tests on temporal operations in the
62 testsuite module.
64 *Completed support for temporal updates
66 *Moved vocabulary related to the temporal features of Strabon to the
67 respective "vocabulary" project
69 *The evaluation of temporal joins in the database does not produce
70 cartesian products in the database
72 * GeoSPARQL functions sfCrosses, sfOverlaps, ehOverlaps do not use the
73 ST_Relate PostGIS function (bug #24:
75 * All Simple Features functions of GeoSPARQL do not use the ST_Relate
76 PostGIS function
78 * Added diffTime function. This function performs the difference
79 between two literals of xsd:time datatype and returns a literal of
80 the xsd:time datatype as well.
82 * Added a testsuite package in default branch. Full tester guide can be found
83 in README. Among other, most of GeoSPARQL compliance tests
84 (, pg. 53) have been
85 implemented.
87 Tue Mar 26 13:28:26 2013 Pyravlos Team
89 * Version 3.2.8 released.
91 * Added support for handling (storing/querying) GeoSPARQL datatypes.
92 (bug #31:
94 * Fixed a bug in StoreOp that wouldn't close the connection, neither
95 rollback the transaction upon an exception. This had as a side effect
96 the abnormal termination of StoreOp (through for example the use of
97 Ctrl-C signal) which was leaving the database locked.
99 * Fixed bug where spatial aggregates (e.g., union) didn't work as
100 expected when the query didn't contain a `GROUP BY' clause.
101 (bug #22:
103 * Updated GeoSPARQL namespaces and fixed function names to comply with
104 the GeoSPARQL specification.
105 (bug #25:
107 *Added preliminary tests on temporal functions in the respective
108 "test" package of the runtime module.
110 *Added option to strabon and endpoint scripts to support storing
111 files in NQUADS format.
113 *When a large file in NQUADS format is going to be stored, it is
114 partitioned and stored in parts. This happens because the translation
115 of quads to triples is a memory intensive job, so, translating and
116 storing the file in batches increases performance.
119 Wed Jan 09 18:06:41 2013 Pyravlos Team
121 * Version 3.2.7 released.
123 * Add an extension function
124 <> for computing the
125 span (in milliseconds) between two timestamps.
127 * Added an <endpoint-exec> module. This module builds an executable jar file
128 with an embedded Apache Tomcat 7. To create and run the executable jar just
129 type:
130 $ mvn clean package
131 $ java -jar endpoint-exec/target/strabon-endpoint-executable-*.jar
133 * Modified strabon script and postgis/monetdb.StoreOP class to get an
134 option for storing a RDF file in a named graph. Moreover, the RDF
135 format of the input RDF file now is given as an option (still, if it
136 is missing, it is assumed that the input is in N-TRIPLES format). The
137 option for the format is -f and the option for the named graph is -g
138 (takes a URI as an argument).
140 * Modified the names of the stSPARQL extension functions that
141 utilize the minimum bounding boxes of the involved geometries.
143 *Fixed bug in the evaluation of temporal constructs.
145 *Fixed a major bug that occured when a temporal variable that also took part
146 in a temporal join was projected.
148 *Renamed temporal extension functions to comply with the respective
149 functions of Allen's temporal relations.
151 *Modified the implementation of the temporal relation functions
152 "meets", "starts", "finishes", to comply with the semantics of the
153 respective functions of Allen. These functions are not supported by
154 PostgreSQL Temporal, so, in order to be evaluated in the database
155 level, we implemented them as PostgreSQL extension functions.
156 ATTENTION: In order to use these functions, the respective sql script
157 that includes them should be loaded to the the temporally (and spa-
158 tially) enabled database.
161 Tue Dec 11 19:33:45 2012 Pyravlos Team
163 * Version 3.2.6 released.
165 * Modified the names of the stSPARQL extension functions to comply
166 with the OGC Simple Features Access standard.
168 Tue Dec 11 00:11:43 2012 Pyravlos Team
170 * Version 3.2.5 released.
172 * Added support for storing and querying temporal information.
173 This functionality may be found in the `temporals' branch.
175 *The datatypes <> and
176 <> are used to
177 represent periods and instants respectively.
179 *The valid time time of triples is represented using quadtruples,
180 with the valid time annotation(instant or period) being the
181 fourth element of the quad. Into this direction:
182 *Strabon has been extended to support the NQUADS format. The
183 respective Sesame packages (of version 2.6.9) that support
184 this format are used.
186 *NQuadTranslator class has been created. This class uses the
187 NQUADS parser which is available here:
188 The initial version of this parser did not include support
189 for literals as the fourth element of the quad. We exteded
190 it to support the valid time representations described above.
192 *The NQUADSTranslator translates quads into triples using the
193 named graph approach, similar to the one proposed by Tappolet
194 et al. and described in
196 *The rdbms level of Strabon has been extended to (i) support
197 tha period datatype (ii) store the period values in the table
198 period_values(id, period). The period column is of the period
199 datatype, offered by the PostgreSQL Temporal extension (
200 Also, a GiST index is created on this column.
202 *A rewriting mechanism that converts quad graph patterns into
203 triple partners using the named graphs approach has been
204 implemented as a method of the runtime.generaldb.Strabon
205 class.
207 *A big part of the temporal functions of stSPARQL has been
208 imlemented. These functions include:
209 *The temporal relation functions during, periodOverlaps,
210 equalsPeriod, nequalsPeriod, adjacent, before, after,
211 overleft, overright, meets, starts, finishes.
213 *The period constructors period_intersect, period_union,
214 preceding_period, and succeeding_period. The last two
215 constructors are implemented using the jtemporal library.
216 The other functions are implemented in the database,
217 being mapped into the respective functions of PostgreSQL
218 Temporal. A complete reference of PostgreSQL Temporal
219 can be found here:
221 *The temporal constants "NOW" and "UC" (Until Changed)
222 are supported.
224 *The vocabulary of the valid time dimension of stSPARQL can
225 be found at the TemporalConstants class of the evaluation
226 module.
228 * Changed behaviour of Strabon and Strabon Endpoint for connecting to
229 a spatially-enabled database. Only one instance of Strabon is allowed
230 at a time.
232 * Implemented a Java client for Strabon Endpoint. The client should be
233 used only with endpoint versions >=3.2.5. The implementation may be
234 found int the `endpoint-client' submodule of maven. Currently, only
235 querying of Strabon Endpoints is supported.
237 * Added support for requesting the capabilities of Strabon Endpoint
238 (fixes Bug #20 <>). See
239 changesets f840796400bf and ?<TBC>? for specific details and how you
240 can determine the capabilities of older endpoints (versions <= 3.2.4).
242 * Updated KML writer to include the projected variables of an stSPARQL
243 query in "ExtendedData" and "Data" tags. This is the proper way to
244 do it if we need to convert a KML to a ESRI shapefile and also include
245 such information as attributes for a feature. See related pages from
246 KML specification:
247 <>
248 <>
250 * Added user authentication for storing RDF data through Strabon
251 Endpoint. The credentials are specified in
252 WEB-INF/ file.
254 * Strabon Endpoints now limits the number of the results to a maximum
255 one. The maximum number is specified in the beans.xml file. This
256 corresponds to parameter "maxLimit". The endpoint script has also been
257 updated correspondingly; the limit can be given using the option "-l".
258 One can disable limiting of query results, by setting the "maxLimit"
259 parameter to 0. Addresses Bug #6
260 (<>).
262 * Added "Known Issues" section to README.
264 * Added -m (more memory) and -M (much more memory) options in strabon
265 script for out-of-memory exceptions.
267 * Fixed Bug #10 (<>). Now
268 KMLWriter handles more geometric types (other than polygons). See
269 changeset 9a3bfee64a39.
271 * Menu and navigation in Strabon Endpoint has changed to use jquery.
272 The menu is now populated using the queries placed inside the beans.xml.
274 * Added BrowseBean and browse.jsp for browsing the RDF data using the
275 Strabon Endpoint.