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ChangeLog
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* Related to bug #58, but it generally enhances Strabon; The runtime
component has also been debianized. Dependencies are added to
/usr/share/jdeb/lib/strabon-runtime. ClassPath and strabon script
have also been updated accordingly (strabon-cmd)
* Bug #58: Maven creates the debian package conditionally. Use
-Ddebian=true in the mvn package command.
* Bug #58: Added dependencies - java, postgresql, tomcat. Also, added
a strabon-init script that detects the postgis installation path
and sets up the template_postgis. Finally the script creates a db
called "endpoint" (assuming it does not already exist) that is used
for the strabon-endpoint command.
* Fixed a bug that would return no results when a variable that results
from a BIND clause appears in the FILTER or in the projection of a
query and is inside a spatial function.
(bug #78: http://bug.strabon.di.uoa.gr/ticket/78)
* Fixed the precision of the geometry literals in GeoJSON writer. Now,
this defaults to the precision model of JTS (equals to 16). Prior to
this it was fixed to 4.
* Now the GeoJSON writer is aware of the kind of typed literals (e.g.,
numeric, boolean, calendar, etc.) and prints the corresponding
values according to these types.
* Fixed a bug that would not return the correct result or would fail
when a spatial function involved a constant and a variable.
(bug #74: http://bug.strabon.di.uoa.gr/ticket/74)
* Fixed a bug that would not return the correct spatial datatype of a
projected geometry literal stored in the database.
(bug #71: http://bug.strabon.di.uoa.gr/ticket/71)
* Now, geometries expressed in CRS84 and a `geo:wktLiteral' datatype
are assigned the correct CRS, i.e., EPSG:4326 with a longitude
latitude axis order.
* Now, we report a parse error when a constant geometry given in a
SELECT or HAVING clause is not well-formed according to the WKT
specification.
(bug #69: http://bug.strabon.di.uoa.gr/ticket/69)
* Function `geof:convexHull' is now supported in a Having clause.
* Fixed older implementation of `strdf:distance' that would expect two
arguments instead of three when present in a HAVING clause.
* Fixed a bug that would cause a class cast exception for grounded
expressions with function nesting in the SELECT or HAVING clause.
* Fixed a bug in which `postgis:ST_Centroid' did not work in the SELECT
clause with input geometries from the database.
* Fixed a bug that `geof:getSRID' would return an integer instead of a
the URI corrresponding to the CRS that the input geometry was
expressed.
(bug #32: http://bug.strabon.di.uoa.gr/ticket/32)
* Fixed a bug that would raise an exception for queries involving two
UNION graph patterns and a projection to a predicate or a URI in
general.
(bug #53: http://bug.strabon.di.uoa.gr/ticket/53)
Wed Sep 17 20:14:12 2014 Pyravlos Team
* Version 3.2.10 released.
* The test suite of Strabon has now reached a mature level. It
contains tests for both stSPARQL and GeoSPARQL query languages and
most of the compliance tests covered in the specification of
GeoSPARQL (well, only those tests for the components that we have
chosen to implement).
* The endpoint now parses Accept headers with multiple values and uses
the first mimetype corresponding to a valid stSPARQLQueryResultFormat.
(bug #64: http://bug.strabon.di.uoa.gr/ticket/64)
* The endpoint now registers a handler for SIGTERM signals, so that if
it is run from the command-line (endpoint-exec), then the closing of
the connection will be ultimately called.
(bug #40: http://bug.strabon.di.uoa.gr/ticket/40)
* Strabon goes debian v1. the endpoint-exec jar is now given in a .deb
format. By dpkg-ing it, one can run a stand alone strabon endpoint
locally.
(bug #45 http://bug.strabon.di.uoa.gr/ticket/58)
* Fixed a bug in which Strabon hanged when a unary spatial construct
had a ternary spatial construct as argument.
(bug #45 http://bug.strabon.di.uoa.gr/ticket/45)
* Fixed a bug according to which spatial functions in ORDER BY were not
evaluated at all.
(bug #62: http://bug.strabon.di.uoa.gr/ticket/62)
* Fixed a bug according to which spatial boolean functions appearing
in the SELECT clause were raising a NULL pointer exception.
(bug #34: http://bug.strabon.di.uoa.gr/ticket/34)
* Fixed a bug in queries that contain variables that exist inside
spatial functions in select and do not exist in the where clause
made Strabon throw a NULL pointer exception.
(bug #51 https://bug.strabon.di.uoa.gr/ticket/51)
* Various changes in the interface and behavior of Strabon Endpoint:
- Revised the logos and the sample queries.
- Results query limit is set to zero (unlimited).
- Users can now store RDF data that is present in a file on the
client side (the file is uploaded to the server).
- Credentials are now required for uploading files or executing
UPDATE queries, unless Strabon Endpoint runs locally (localhost).
- When viewing the results of queries in HTML, any URI is now an
active link to itself. Previously, that URI was being DESCRIBEd
and one was being transferred to a page viewing the result of the
DESCRIBE query.
- The DESCRIBE functionality can now be accessed through the menu bar.
* Fixed a bug where strdf:intersection function did not work as an
aggregate when used without 'GROUP BY'.
(bug #46 https://bug.strabon.di.uoa.gr/ticket/46)
Sat Oct 19 23:37:23 2013 Pyravlos Team
* Version 3.2.9 released.
* Added support for the following google chart types: PieChart,
AreaChart and ColumnChart to strabon endpoint.
* Added Timemap as new results format in Strabon endpoint. This
option displays results in a map and a timeline on the same time,
using the Timemap js library (http://code.google.com/p/timemap/).
The KMLWriter has been extended for that purpose, by transforming
dateTime values that are included in the result set into the respective
TimeStamp KML primitive (https://developers.google.com/kml/documentation/time).
In the "temporals" branch, the values of the strdf:period datatype
are converted into the respective KML TimeSpan primitive.
* Added extension function <http://postgis.net/ST_Centroid> which is
mapped to the ST_Centroid(geometry) extension function of PostGIS.
See also: <http://postgis.org/docs/ST_Centroid.html>.
* Added extension function <http://postgis.net/ST_MakeLine> which is
mapped to the ST_MakeLine(geometry, geometry) extension function of
PostGIS. See also: <http://postgis.org/docs/ST_MakeLine.html>.
* Added PostGIS vocabulary class.
* Added support of all SPARQL result types provided by Sesame (json,
xml, csv, tsv, binary). To get the respective writer, just prepend the
string "SPARQL/", e.g., "SPARQL/JSON". This is to ensure that we
support all SPARQL result formats of the SPARQL Protocol.
* Fixed a bug where a non-implemented extension function would make
Strabon throw a NULL pointer exception. Now we get away with it
through a warning.
* Strabon endpoint now publishes the URIs of the supported units of
measure for use in strdf:distance and geof:distance functions of
stSPARQL and GeoSPARQL, respectively. The URIs are those defined by
OGC Units of Measure 1.0 specification which may be found at
http://www.opengis.net/def/uom/OGC/1.0/. Strabon endpoint publishes
the URIs at http://localhost:8080/endpoint/Capabilities.
* Created new module with name 'vocab` and artifactId
'strabon-vocabulary` and moved GeoConstants.java there. Other
vocabularies have been added as well, such as Simple Features, and
GeoSPARQL.
* Strabon endpoint now publishes the URIs of the supported extension
functions for stSPARQL and GeoSPARQL. One should access them by
hitting the link http://localhost:8080/endpoint/Capabilities.
* Support for parsing EPSG URIs in geometry literals with datatype
geo:wktLiteral.
(bug #33: http://bug.strabon.di.uoa.gr/ticket/33)
* Endpoint Client now supports querying of Virtuoso and Parliament endpoints.
* Endpoint Client now supports store and update operations, but only
for Strabon Endpoints.
* GeoSPARQL functions sfCrosses, sfOverlaps, ehOverlaps do not use the
ST_Relate PostGIS function (bug #24: http://bug.strabon.di.uoa.gr/ticket/24)
* All Simple Features functions of GeoSPARQL do not use the ST_Relate
PostGIS function
* Added diffTime function. This function performs the difference
between two literals of xsd:time datatype and returns a literal of
the xsd:time datatype as well.
* Added a testsuite package in default branch. Full tester guide can be found
in README. Among other, most of GeoSPARQL compliance tests
(https://portal.opengeospatial.org/files/?artifact_id=47664, pg. 53) have been
implemented.
* Changed the definition and implementation of strdf:distance function, by
adopting the definition of GeoSPARQL.
(bug #23: http://bug.strabon.di.uoa.gr/ticket/23)
* Changed the definition and implementation of strdf:buffer function, by
adopting the definition of GeoSPARQL.
(bug #35: http://bug.strabon.di.uoa.gr/ticket/35)
* Added geof:distance and geof:buffer functions, which have the same definition
with strdf:distance and strdf:buffer respectively.
(bug #32: http://bug.strabon.di.uoa.gr/ticket/32)
* Added a download button when performing describe and construct queries at the
endpoint.
(bug #38: http://bug.strabon.di.uoa.gr/ticket/38)
* Fixed a bug, where XMLWriter and TSVWriter did not return geometries with the
SRID.
(bug #47: http://bug.strabon.di.uoa.gr/ticket/47)
* Fixed a bug where the GeoSPARQL construct functions did not return the datatype
geo:wktLiteral datatype but strdf:WKT.
Tue Mar 26 13:28:26 2013 Pyravlos Team
* Version 3.2.8 released.
* Added support for handling (storing/querying) GeoSPARQL datatypes.
(bug #31: http://bug.strabon.di.uoa.gr/ticket/31)
* Fixed a bug in StoreOp that wouldn't close the connection, neither
rollback the transaction upon an exception. This had as a side effect
the abnormal termination of StoreOp (through for example the use of
Ctrl-C signal) which was leaving the database locked.
* Fixed bug where spatial aggregates (e.g., union) didn't work as
expected when the query didn't contain a `GROUP BY' clause.
(bug #22: http://bug.strabon.di.uoa.gr/ticket/22)
* Updated GeoSPARQL namespaces and fixed function names to comply with
the GeoSPARQL specification.
(bug #25: http://bug.strabon.di.uoa.gr/ticket/25)
Wed Jan 09 18:06:41 2013 Pyravlos Team
* Version 3.2.7 released.
* Add an extension function
<http://strdf.di.uoa.gr/extensions/ontology#diffDateTime> for computing the
span (in milliseconds) between two timestamps.
* Added an <endpoint-exec> module. This module builds an executable jar file
with an embedded Apache Tomcat 7. To create and run the executable jar just
type:
$ mvn clean package
$ java -jar endpoint-exec/target/strabon-endpoint-executable-*.jar
* Modified strabon script and postgis/monetdb.StoreOP class to get an
option for storing a RDF file in a named graph. Moreover, the RDF
format of the input RDF file now is given as an option (still, if it
is missing, it is assumed that the input is in N-TRIPLES format). The
option for the format is -f and the option for the named graph is -g
(takes a URI as an argument).
* Modified the names of the stSPARQL extension functions that
utilize the minimum bounding boxes of the involved geometries.
Tue Dec 11 19:33:45 2012 Pyravlos Team
* Version 3.2.6 released.
* Modified the names of the stSPARQL extension functions to comply
with the OGC Simple Features Access standard.
Tue Dec 11 00:11:43 2012 Pyravlos Team
* Version 3.2.5 released.
* Added support for querying temporal information. This functionality
may be found in the `temporals' branch.
The datatypes <http://strdf.di.uoa.gr/ontology#period> and
<http://www.w3.org/2001/XMLSchema#dateTime> are used to
represent periods and instants respectively.
The valid time time of triples is represented using quadtruples,
with the valid time annotation(instant or period) being the
fourth element of the quad. In the same way, temporal triple
patterns are used in queries to retrieve the valid time of
triples.
Some functions have been renamed (their URIs have changed) to
follow the names of the respective relations of Allen's
interval algebra and other functions have been added.
The following temporal functions are supported:
during, periodOverlaps, equalsPeriod, nequalsPeriod, adjacent,
before, after, overleft, overright, meets, starts, finishes,
period_intersect, period_union, preceding_period, and
succeeding_period.
* Changed behaviour of Strabon and Strabon Endpoint for connecting to
a spatially-enabled database. Only one instance of Strabon is allowed
at a time.
* Implemented a Java client for Strabon Endpoint. The client should be
used only with endpoint versions >=3.2.5. The implementation may be
found int the `endpoint-client' submodule of maven. Currently, only
querying of Strabon Endpoints is supported.
* Added support for requesting the capabilities of Strabon Endpoint
(fixes Bug #20 <http://bug.strabon.di.uoa.gr/ticket/20>). See
changesets f840796400bf and ?<TBC>? for specific details and how you
can determine the capabilities of older endpoints (versions <= 3.2.4).
* Updated KML writer to include the projected variables of an stSPARQL
query in "ExtendedData" and "Data" tags. This is the proper way to
do it if we need to convert a KML to a ESRI shapefile and also include
such information as attributes for a feature. See related pages from
KML specification:
<https://developers.google.com/kml/documentation/kmlreference#extendeddata>
<https://developers.google.com/kml/documentation/extendeddata>
* Added user authentication for storing RDF data through Strabon
Endpoint. The credentials are specified in
WEB-INF/credentials.properties file.
* Strabon Endpoints now limits the number of the results to a maximum
one. The maximum number is specified in the beans.xml file. This
corresponds to parameter "maxLimit". The endpoint script has also been
updated correspondingly; the limit can be given using the option "-l".
One can disable limiting of query results, by setting the "maxLimit"
parameter to 0. Addresses Bug #6
(<http://bug.strabon.di.uoa.gr/ticket/6>).
* Added "Known Issues" section to README.
* Added -m (more memory) and -M (much more memory) options in strabon
script for out-of-memory exceptions.
* Fixed Bug #10 (<http://bug.strabon.di.uoa.gr/ticket/10>). Now
KMLWriter handles more geometric types (other than polygons). See
changeset 9a3bfee64a39.
* Menu and navigation in Strabon Endpoint has changed to use jquery.
The menu is now populated using the queries placed inside the beans.xml.
* Added BrowseBean and browse.jsp for browsing the RDF data using the
Strabon Endpoint.