Strabon

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author Babis Nikolaou <charnik@di.uoa.gr>
date Thu Apr 04 00:38:15 2013 +0300 (2013-04-04)
parents cd8b50e4ac90
children ef00f6eb372b
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charnik@211 1 Strabon
charnik@211 2 -----------
charnik@211 3
charnik@211 4 Introduction
charnik@211 5 ============
charnik@211 6 Strabon is a fully implemented semantic geospatial database system that can be
charnik@211 7 used to store linked geospatial data expressed in RDF and query them using an
charnik@211 8 extension of SPARQL. Strabon supports spatial selections, spatial joins, a rich
charnik@211 9 set of spatial functions similar to those offered by geospatial relational
charnik@211 10 database systems, support for multiple Coordinate Reference Systems and widely
charnik@211 11 used serializations for geometric objects such as WKT and GML. Strabon is built
charnik@211 12 on top of the well-known RDF store Sesame and extends Sesame’s components to be
charnik@211 13 able to manage thematic and spatial data that are stored in PostGIS.
charnik@211 14
charnik@211 15 The development of Strabon started in the context of European FP7 project
charnik@211 16 SemsorGrid4Env (Semantic Sensor Grids for Rapid Application Development for
charnik@211 17 Environmental Management) [http://www.semsorgrid4env.eu/]. Starting September
charnik@211 18 2011, Strabon is being utilized and extended with new functionalities in the
charnik@211 19 FP7 project TELEIOS (Virtual Observatory Infrastructure for Earth Observation
charnik@211 20 Data) [http://www.earthobservatory.eu/] which our group leads.
charnik@211 21
charnik@211 22 The query language of Strabon is called stSPARQL. stSPARQL can be used to query
charnik@211 23 data represented in an extension of RDF called stRDF. stRDF and stSPARQL have
charnik@211 24 been designed for representing and querying geospatial data that changes over
charnik@211 25 time (e.g., the growth of a city over the years due to new developments).
charnik@211 26
charnik@211 27 Currently, only the geospatial features of stSPARQL have been implemented fully.
charnik@211 28 The temporal features are the subject of current work.
charnik@211 29
kkyzir@639 30 Given the very close relationship between stSPARQL and GeoSPARQL which is a
kkyzir@639 31 recent OGC standard for an extension of SPARQL for querying geospatial metadata,
kkyzir@639 32 we recently provided support for the Core, Geometry and Geometry Topology
kkyzir@639 33 extension of GeoSPARQL.
kkyzir@639 34
charnik@211 35
charnik@212 36 Strabon Homepage
charnik@212 37 ================
charnik@212 38 The homepage of Strabon is at http://www.strabon.di.uoa.gr/.
charnik@212 39
charnik@212 40
charnik@211 41 Demo
charnik@211 42 ====
charnik@211 43 You can find a demo of the system Strabon at http://test.strabon.di.uoa.gr/NOA/.
charnik@211 44
charnik@212 45
charnik@211 46 Getting Started
charnik@211 47 ===============
charnik@211 48 To get started with Strabon please have a look at the tutorial for the stRDF
charnik@211 49 data model and stSPARQL query language, the User Guide, and the Developer Guide.
charnik@211 50
charnik@211 51 stRDF and stSPARQL tutorial
charnik@211 52 http://www.strabon.di.uoa.gr/files/stSPARQL_tutorial.pdf
charnik@211 53
kkyzir@800 54
kkyzir@800 55 stSPARQL Reference
kkyzir@800 56 ~~~~~~~~~~~~~~~~~~
kkyzir@800 57 The reference for the spatial and temporal extension functions defined in
kkyzir@800 58 stSPARQL can be found at http://www.strabon.di.uoa.gr/stSPARQL#spatial and
kkyzir@800 59 http://www.strabon.di.uoa.gr/stSPARQL#temporals respectively.
kkyzir@800 60
kkyzir@800 61
charnik@211 62 User Guide
charnik@211 63 ~~~~~~~~~~
charnik@211 64 Assuming that you are familiar with Maven, the following steps need to be
charnik@211 65 followed in order to use Strabon using Eclipse:
charnik@211 66
charnik@211 67 1. Install PostgreSQL from http://www.postgresql.org/download/. At the time of
charnik@211 68 this writing the latest PostgreSQL version is 9.1.
charnik@211 69 2. Install PostGIS from http://postgis.refractions.net/download/. At the time of
charnik@211 70 this writing we have tested Strabon with PostGIS 1.5.3.
charnik@211 71 3. Install Maven from http://maven.apache.org/download.html. At the time of this
charnik@211 72 writing the latest Maven version is 3.0.4.
charnik@211 73 4. Install Eclipse from http://www.eclipse.org/downloads/. At the time of this
charnik@211 74 writing the latest Eclipse version is 3.7.2.
charnik@211 75 5. Install the m2e plugin for Eclipse from http://www.eclipse.org/m2e/.
charnik@211 76 6. Install the MercurialEclipse plugin for Eclipse from
charnik@211 77 http://javaforge.com/project/HGE .
charnik@211 78 7. From Eclipse, go to File --> Import --> Mercurial --> Clone Existing
charnik@211 79 Mercurial Repository --> Next. In the URL textarea paste the following
charnik@211 80 URL: http://hg.strabon.di.uoa.gr/StrabonUser and then press Next --> Next -->
charnik@211 81 Finish. If you used the default settings, you should have a new project named
charnik@211 82 StrabonMain. Right click on the project and select Configure --> Convert to
charnik@211 83 Maven project. Eclipse will enable Maven dependency management for the
charnik@211 84 project, download any dependencies and build the project.
charnik@211 85
charnik@211 86
charnik@211 87 Storing stRDF graphs and evaluating stSPARQL queries
charnik@211 88 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
charnik@211 89 You can see some examples in the classes gr.uoa.di.strabon.example.PostgisExample
charnik@211 90 and gr.uoa.di.strabon.example.PostgisExample2.
charnik@211 91
kkyzir@954 92 Tuning PostgreSQL
kkyzir@954 93 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kkyzir@954 94 The default settings of Postgres are rather conservative. As a result, parameter
kkyzir@954 95 tuning is neccessary for speeding up Postgres, therefore Strabon. If you are
kkyzir@954 96 using Strabon to compare its performance against your implementation of
kkyzir@954 97 stSPARQL/GeoSPARQL, you are *strongly* encouraged to contact us using the Strabon
kkyzir@954 98 Users mailing list for assistance on tuning Postgres.
kkyzir@954 99
kkyzir@954 100 You can follow the instructions below for tuning a Postgres server running on an
kkyzir@954 101 Ubuntu machine that is dedicated to PostgreSQL and Strabon.
kkyzir@954 102
kkyzir@954 103 1. Append the following text at the end of postgresql.conf.
kkyzir@954 104 *Uncomment* the appropriate lines.
kkyzir@954 105
kkyzir@954 106 ### RAM
kkyzir@954 107 ## 4 GB of RAM
kkyzir@954 108 #shared_buffers = 3GB
kkyzir@954 109 #effective_cache_size = 3GB
kkyzir@954 110 #maintenance_work_mem = 1GB
kkyzir@954 111 #work_mem = 2GB
kkyzir@954 112 ## 8 GB of RAM
kkyzir@954 113 #shared_buffers = 5GB
kkyzir@954 114 #effective_cache_size = 6GB
kkyzir@954 115 #maintenance_work_mem = 2GB
kkyzir@954 116 #work_mem = 5GB
kkyzir@954 117 ## 16 GB of RAM
kkyzir@954 118 #shared_buffers = 10GB
kkyzir@954 119 #effective_cache_size = 14GB
kkyzir@954 120 #maintenance_work_mem = 4GB
kkyzir@954 121 #work_mem = 10GB
kkyzir@954 122 ## 24 GB of RAM
kkyzir@954 123 #shared_buffers = 16GB
kkyzir@954 124 #effective_cache_size = 22GB
kkyzir@954 125 #maintenance_work_mem = 6GB
kkyzir@954 126 #work_mem = 15GB
kkyzir@954 127 ## 48 GB of RAM
kkyzir@954 128 #shared_buffers = 32GB
kkyzir@954 129 #effective_cache_size = 46GB
kkyzir@954 130 #maintenance_work_mem = 8GB
kkyzir@954 131 #work_mem = 30GB
kkyzir@954 132 ## 64 GB of RAM
kkyzir@954 133 # contact us to find out!
kkyzir@954 134 ### HD
kkyzir@954 135 ## RAID with ordinary 7.200 disks
kkyzir@954 136 #random_page_cost = 3.5 #3.0-3.5
kkyzir@954 137 ## High-End NAS/SAN
kkyzir@954 138 #random_page_cost = 2 #1.5-2.5
kkyzir@954 139 ## Amazon EBS/Heroku
kkyzir@954 140 #random_page_cost = 1.3 #1.1-2.0
kkyzir@954 141 ## SSD array
kkyzir@954 142 #random_page_cost = 2.0 #1.5-2.5
kkyzir@954 143 ### Misc
kkyzir@954 144 default_statistics_target = 10000
kkyzir@954 145 constraint_exclusion = on
kkyzir@954 146 checkpoint_completion_target = 0.9
kkyzir@954 147 wal_buffers = 32MB
kkyzir@954 148 checkpoint_segments = 64
kkyzir@954 149 ### Connections
kkyzir@954 150 max_connections = 10
kkyzir@954 151
kkyzir@954 152 2. Append the following lines at the end of /etc/sysctl.conf
kkyzir@954 153 *Uncomment* the appropriate lines.
kkyzir@954 154
kkyzir@954 155 ## 4 GB of RAM
kkyzir@954 156 #kernel.shmmax = 3758096384
kkyzir@954 157 #kernel.shmall = 3758096384
kkyzir@954 158 #kernel.shmmni = 4096
kkyzir@954 159 ## 8 GB of RAM
kkyzir@954 160 #kernel.shmmax = 5905580032
kkyzir@954 161 #kernel.shmall = 5905580032
kkyzir@954 162 #kernel.shmmni = 4096
kkyzir@954 163 ## 16 GB of RAM
kkyzir@954 164 #kernel.shmmax = 11274289152
kkyzir@954 165 #kernel.shmall = 11274289152
kkyzir@954 166 #kernel.shmmni = 4096
kkyzir@954 167 ## 24 GB of RAM
kkyzir@954 168 #kernel.shmmax = 17716740096
kkyzir@954 169 #kernel.shmall = 17716740096
kkyzir@954 170 #kernel.shmmni = 4096
kkyzir@954 171 ## 48 GB of RAM
kkyzir@954 172 #kernel.shmmax = 35433480192
kkyzir@954 173 #kernel.shmall = 35433480192
kkyzir@954 174 #kernel.shmmni = 4224
kkyzir@954 175 ## 64 GB of RAM
kkyzir@954 176 # contact us to find out!
kkyzir@954 177
charnik@969 178 3. Apply all changes by executing
kkyzir@954 179
kkyzir@954 180 $ sudo sysctl -p
kkyzir@954 181 $ sudo /etc/init.d/postgresql restart
kkyzir@954 182
kkyzir@954 183 4. Prepare for the next run by issuing the command
kkyzir@954 184
kkyzir@954 185 $ sudo -u postgres psql -c 'VACUUM ANALYZE;' db
kkyzir@954 186
kkyzir@954 187 or
kkyzir@954 188
kkyzir@954 189 $ psql -c 'VACUUM ANALYZE;' db
kkyzir@954 190
kkyzir@954 191 where db is the name of the Postgres database that Strabon will use.
kkyzir@954 192
charnik@211 193
charnik@211 194 Developer Guide
charnik@211 195 ~~~~~~~~~~~~~~~
charnik@211 196 Assuming that you are familiar with Maven, the following steps need to be
charnik@211 197 followed in order to use Strabon using Eclipse:
charnik@211 198
charnik@211 199 1. Install PostgreSQL from http://www.postgresql.org/download/. At the time of
charnik@211 200 this writing the latest PostgreSQL version is 9.1.
charnik@211 201 2. Install PostGIS from http://postgis.refractions.net/download/. At the time of
charnik@211 202 this writing we have tested Strabon with PostGIS 1.5.3.
charnik@211 203 3. Install Maven from http://maven.apache.org/download.html. At the time of this
charnik@211 204 writing the latest Maven version is 3.0.4.
charnik@211 205 4. Install Eclipse from http://www.eclipse.org/downloads/. At the time of this
charnik@211 206 writing the latest Eclipse version is 3.7.2.
charnik@211 207 5. Install the m2e plugin for Eclipse from http://www.eclipse.org/m2e/.
charnik@211 208 6. Install the MercurialEclipse plugin for Eclipse from
charnik@211 209 http://javaforge.com/project/HGE.
charnik@211 210 7. From Eclipse, go to File --> Import --> Mercurial --> Clone Existing
charnik@211 211 Mercurial Repository --> Next. In the URL textarea paste the following
charnik@211 212 URL: http://hg.strabon.di.uoa.gr/Strabon and then press Next --> Next -->
charnik@211 213 Finish. If you used the default settings, you should have a new project named
charnik@211 214 StrabonMain. Right click on the project and select Configure --> Convert to
charnik@211 215 Maven project. Eclipse will enable Maven dependency management for the
charnik@211 216 project, download any dependencies and build the project.
charnik@211 217
charnik@211 218
charnik@211 219 Storing stRDF graphs and evaluating stSPARQL queries
charnik@211 220 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
charnik@211 221 You can see some examples in the classes
charnik@211 222 eu.earthobservatory.runtime.postgis.StoreOp and
charnik@211 223 eu.earthobservatory.runtime.postgis.QueryOp.
charnik@211 224
charnik@211 225
charnik@211 226 Download
charnik@211 227 ========
charnik@211 228 You can download the source code of the latest version of Strabon by accessing
charnik@211 229 our public mercurial repository located at http://hg.strabon.di.uoa.gr/Strabon.
charnik@211 230 You can find more information on how to use and extend Strabon at the Getting
charnik@211 231 Started section.
charnik@211 232
charnik@211 233
charnik@211 234 Publications
charnik@211 235 ============
charnik@211 236 You can learn about stRDF data model and stSPARQL query language employed in
charnik@211 237 Strabon by reading our tutorial under the Getting Started section and/or the
charnik@211 238 publications given on this page.
charnik@211 239
charnik@211 240 The current versions of stRDF and stSPARQL which are based on OGC standards are
charnik@211 241 presented in the following document:
charnik@554 242 * K. Kyzirakos, M. Karpathiotakis, and M. Koubarakis. Strabon: A Semantic
charnik@554 243 Geospatial DBMS. In Internatioanl Semantic Web Conference (ISWC'12). Boston,
charnik@554 244 USA, November 11-15, 2012.
charnik@554 245 [pdf: http://strabon.di.uoa.gr/files/strabon-iswc.pdf]
charnik@554 246
charnik@211 247 * Manolis Koubarakis, Kostis Kyzirakos, Babis Nikolaou, Michael Sioutis, and
charnik@211 248 Stavros Vassos. A data model and query language for an extension of RDF with
charnik@211 249 time and space. Deliverable D2.1, European ICT project TELEIOS, 2011.
charnik@211 250 [pdf: http://strabon.di.uoa.gr/files/deliv2-1-re-revised.pdf]
charnik@211 251
charnik@211 252 The initial versions of stRDF and stSPARQL that are based on constraint
charnik@211 253 databases are presented in the following publications:
charnik@211 254 * Manolis Koubarakis and Kostis Kyzirakos. Modeling and Querying Metadata in
charnik@211 255 the Semantic Sensor Web: the Model stRDF and the Query Language stSPARQL.
charnik@211 256 In 7th Extended Semantic Web Conference (ESWC 2010). Heraklion, Crete,
charnik@211 257 30 May - 03 June, 2010.
charnik@211 258 [pdf: http://strabon.di.uoa.gr/files/stSPARQL.pdf]
charnik@211 259
charnik@211 260 * Kostis Kyzirakos, Manos Karpathiotakis and Manolis Koubarakis. Developing
charnik@211 261 Registries for the Semantic Sensor Web using stRDF and stSPARQL (short
charnik@211 262 paper).
charnik@211 263 In Proceedings of 3rd International workshop on Semantic Sensor Networks
charnik@211 264 2010, in conjunction with ISWC 2010, November 2010, Shanghai, China.
charnik@211 265 [pdf: http://strabon.di.uoa.gr/files/strabon.pdf]
charnik@211 266
charnik@211 267 Applications of stRDF, stSPARQL, and the system Strabon are described here:
charnik@211 268 * Alasdair J. G. Gray, Raúl García-Castro, Kostis Kyzirakos, Manos
charnik@211 269 Karpathiotakis, Jean-Paul Calbimonte, Kevin Page, Jason Sadler, Alex
charnik@211 270 Frazer, Ixent Galpin, Alvaro A. A. Fernandes, Norman W. Paton, Oscar
charnik@211 271 Corcho, Manolis Koubarakis, David De Roure, Kirk Martinez and Asunción
charnik@211 272 Gómez-Pérez. A Semantically Enabled Service Architecture for Mashups over
charnik@211 273 Streaming and Stored Data. In 8th Extended Semantic Web Conference (ESWC
charnik@211 274 2011). Heraklion, Crete, May 20 - June 2, 2011.
charnik@211 275 [pdf: http://strabon.di.uoa.gr/files/Gray2011Architecture.pdf]
charnik@211 276
charnik@211 277 * A.J.G. Gray, J. Sadler, O. Kit, K. Kyzirakos, M. Karpathiotakis, J.-P.
charnik@211 278 Calbimonte, K. Page, R. García-Castro, A. Frazer, I. Galpin, A.A.A.
charnik@211 279 Fernandes, N.W. Paton, O. Corcho, M. Koubarakis, D.D. Roure, K. Martinez,
charnik@211 280 A. Gómez-Pérez. A Semantic Sensor Web for Environmental Decision Support
charnik@211 281 Applications. Sensors. 11, 8855-8887.
charnik@211 282 [pdf: http://strabon.di.uoa.gr/files/sensors-11-08855.pdf]
charnik@211 283
charnik@211 284 Coming up soon:
charnik@211 285 Strabon will soon support an extension of RDF for incomplete geospatial
charnik@211 286 information. The following publication gives a preview of the relevant research
charnik@211 287 problems:
charnik@211 288 * M. Koubarakis, K. Kyzirakos, M. Karpathiotakis, C. Nikolaou, M. Sioutis,
charnik@211 289 S. Vassos, D. Michail, T. Herekakis, C. Kontoes and I. Papoutsis. Challenges
charnik@211 290 for Qualitative Spatial Reasoning in Linked Geospatial Data. In Proceedings
charnik@211 291 of IJCAI 2011 Workshop on Benchmarks and Applications of Spatial Reasoning,
charnik@211 292 Barcelona, Spain.
charnik@212 293 [pdf: http://www.earthobservatory.eu/publications/SciQL_ADASS2011.pdf]
charnik@211 294
charnik@812 295 * C. Nikolaou and M. Koubarakis: "Querying Linked Geospatial Data with
charnik@812 296 Incomplete Information". In 5th International Terra Cognita Workshop -
charnik@812 297 Foundations, Technologies and Applications of the Geospatial Web. In
charnik@812 298 conjunction with the 11th International Semantic Web Conference, Boston,
charnik@812 299 USA, November, 2012.
charnik@812 300 [http://www.earthobservatory.eu/publications/iswc-workshop.pdf]
charnik@812 301
charnik@211 302
charnik@211 303 Contributors
charnik@211 304 ============
charnik@211 305 The system Strabon has been developed by the following members of our team:
charnik@211 306
charnik@211 307 * Manos Karpathiotakis <mk@di.uoa.gr>
charnik@211 308 * Kostis Kyzirakos <kkyzir@di.uoa.gr>
charnik@211 309 * Manolis Koubarakis <koubarak@di.uoa.gr>
charnik@211 310 * Giorgos Garbis <ggarbis@di.uoa.gr>
charnik@211 311 * Konstantina Bereta <konstantina.bereta@di.uoa.gr>
kkyzir@639 312 * Charalampos Nikolaou <charnik@di.uoa.gr>
kkyzir@639 313 * Stella Gianakopoulou <sgian@di.uoa.gr>
kkyzir@639 314 * Panagiotis Smeros <psmeros@di.uoa.gr>
kallirroi@902 315 * Kallirroi Dogani <kallirroi@di.uoa.gr>
charnik@211 316
charnik@211 317
charnik@211 318 Mailing-list
charnik@211 319 ============
kkyzir@954 320 Currently, we maintain the following mailing lists:
kkyzir@954 321
kkyzir@954 322 * Strabon-users, is used as a communication channel for Strabon users.
kkyzir@954 323 To subscribe to the mailing-list, please visit page
kkyzir@954 324 http://cgi.di.uoa.gr/~mailman/listinfo/strabon-users. To post e-mails
kkyzir@954 325 to Strabon-users mailing-list, write to strabon-users@di.uoa.gr.
kkyzir@954 326
kkyzir@954 327 * Strabon-devel, is used as a communication channel with the developers
kkyzir@954 328 of Strabon. To subscribe to the mailing-list, please visit page
kkyzir@954 329 http://cgi.di.uoa.gr/~mailman/listinfo/strabon-devel. To post e-mails
kkyzir@954 330 to Strabon-devel mailing-list, write to strabon-devel@di.uoa.gr.
charnik@211 331
charnik@211 332
charnik@211 333 Bugs
charnik@211 334 ====
charnik@211 335 Please report bugs to http://bug.strabon.di.uoa.gr/report or
charnik@211 336 the Strabon-devel mailing-list Strabon-devel@di.uoa.gr.
charnik@212 337
charnik@212 338
sgian@627 339 Known Issues
sgian@627 340 ============
charnik@846 341 * By default, Tomcat uses ISO-8859-1 character encoding when decoding URLs received
charnik@846 342 from a browser. This can cause problems when encoding is UTF-8, and you are using
charnik@846 343 international characters. In order to fix this, edit conf/server.xml and find the
charnik@846 344 line where the Connector is defined. Add the parameter URIEncoding and set it to
charnik@846 345 UTF-8. For example:
sgian@627 346
charnik@846 347 <Connector port="8080" protocol="HTTP/1.1"
charnik@846 348 connectionTimeout="20000"
charnik@846 349 URIEncoding="UTF-8"
charnik@846 350 redirectPort="8443" />
charnik@846 351
charnik@846 352 * Building and executing any maven goals fails for maven versions <3.0 due to a
charnik@846 353 dependency to the `shade' plugin that is available only for maven version 3.0
charnik@846 354 (http://maven.apache.org/plugins/maven-shade-plugin/). In such systems, you may
charnik@846 355 disable execution of this plugin by setting the environmental variable
charnik@846 356 `shade.skip'. For example, to build Strabon using maven version 2.0 you may
charnik@846 357 execute the following command:
charnik@846 358
charnik@846 359 $ mvn clean package -Dshade.skip
sgian@627 360
sgian@967 361 * When using MonetDB as a backend, the following source code of MonetDB must be
sgian@967 362 used:
sgian@967 363 https://hg.strabon.di.uoa.gr/MonetDB/
sgian@967 364
sgian@627 365
charnik@212 366 License
charnik@212 367 =======
charnik@553 368 This Source Code Form is subject to the terms of the Mozilla Public
charnik@553 369 License, v. 2.0. If a copy of the MPL was not distributed with this
charnik@553 370 file, You can obtain one at http://mozilla.org/MPL/2.0/.
charnik@553 371
charnik@553 372 Copyright (C) 2010, 2011, 2012, Pyravlos Team
charnik@553 373
charnik@553 374 http://www.strabon.di.uoa.gr/
charnik@553 375
charnik@553 376
charnik@553 377 How to apply the license
charnik@553 378 ========================
charnik@866 379 * In the beginning of script files (after the shell directive) paste the
charnik@866 380 following statement:
charnik@553 381 #
charnik@553 382 # This Source Code Form is subject to the terms of the Mozilla Public
charnik@553 383 # License, v. 2.0. If a copy of the MPL was not distributed with this
charnik@553 384 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
charnik@553 385 #
charnik@553 386 # Copyright (C) 2010, 2011, 2012, Pyravlos Team
charnik@553 387 #
charnik@553 388 # http://www.strabon.di.uoa.gr/
charnik@553 389 #
charnik@553 390
charnik@866 391 * In the beginning of Java source code files paste the following statement:
charnik@553 392 /**
charnik@553 393 * This Source Code Form is subject to the terms of the Mozilla Public
charnik@553 394 * License, v. 2.0. If a copy of the MPL was not distributed with this
charnik@553 395 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
charnik@553 396 *
charnik@553 397 * Copyright (C) 2010, 2011, 2012, Pyravlos Team
charnik@553 398 *
charnik@553 399 * http://www.strabon.di.uoa.gr/
charnik@553 400 */
charnik@553 401
charnik@866 402 * In the beginning of HTML/XML files paste the following statement:
charnik@553 403 <!-- This Source Code Form is subject to the terms of the Mozilla Public
charnik@553 404 - License, v. 2.0. If a copy of the MPL was not distributed with this
charnik@553 405 - file, You can obtain one at http://mozilla.org/MPL/2.0/.
charnik@553 406 -
charnik@553 407 - Copyright (C) 2010, 2011, 2012, Pyravlos Team
charnik@553 408 -
charnik@553 409 - http://www.strabon.di.uoa.gr/
charnik@553 410 -->