default search action
Witold Litwin
Person information
SPARQL queries
Refine list
refinements active!
zoomed in on ?? of ?? records
view refined list in
export refined list as
2020 – today
- 2024
- [c85]Witold Litwin:
Manifesto for SIR SQL. ICIEI 2024 - 2022
- [c84]Witold Litwin:
Stored and Inherited Relations with PKN Foreign Keys. ADBIS (Short Papers) 2022: 487-499 - 2021
- [c83]Witold Litwin:
Natural Stored and Inherited Relations. EUSPN/ICTH 2021: 171-178
2010 – 2019
- 2019
- [c82]Witold Litwin:
Manifesto for Improved Foundations of Relational Model. EUSPN/ICTH 2019: 624-628 - [c81]Witold Litwin:
SQL for Stored and Inherited Relations. ICEIS (1) 2019: 37-48 - [i3]Witold Litwin:
Manifesto for Improved Foundations of Relational Model. CoRR abs/1912.08352 (2019) - 2017
- [i2]Witold Litwin:
Stored and Inherited Relations. CoRR abs/1703.09574 (2017) - 2016
- [j21]Camélia Constantin, Cédric du Mouza, Witold Litwin, Philippe Rigaux, Thomas J. E. Schwarz:
AS-Index: A Structure for String Search Using n-Grams and Algebraic Signatures. J. Comput. Sci. Technol. 31(1): 147-166 (2016) - [c80]Sushil Jajodia, Witold Litwin, Thomas J. E. Schwarz:
Trusted cloud SQL DBS with on-the-fly AES decryption/encryption. IEEE BigData 2016: 3666-3675 - [c79]Sushil Jajodia, Witold Litwin, Thomas J. E. Schwarz:
On-the-Fly AES256 Decryption/Encryption for Trusted Cloud SQL DBS: Position Statement. DEXA Workshops 2016: 19-23 - 2015
- [c78]Silvia Grampone, Witold Litwin, Thomas J. E. Schwarz:
An Autonomous Data Structure for Brute Force Calculations in the Cloud. CloudCom 2015: 347-354 - [c77]Sushil Jajodia, Witold Litwin, Thomas J. E. Schwarz:
Numerical SQL Value Expressions Over Encrypted Cloud Databases. DEXA (2) 2015: 455-478 - [c76]Silvia Grampone, Witold Litwin, Thomas J. E. Schwarz:
A Dependable, Scalable, Distributed, Virtual Data Structure. ICA3PP (Workshops and Symposiums) 2015: 724-735 - [i1]Sushil Jajodia, Witold Litwin, Thomas J. E. Schwarz:
On-the fly AES Decryption/Encryption for Cloud SQL Databases. CoRR abs/1512.06423 (2015) - 2013
- [j20]Sushil Jajodia, Witold Litwin, Thomas J. E. Schwarz:
Recoverable Encryption through a Noised Secret over a Large Cloud. Trans. Large Scale Data Knowl. Centered Syst. 9: 42-64 (2013) - [c75]Jehan-François Pâris, Darrell D. E. Long, Witold Litwin:
Three-Dimensional Redundancy Codes for Archival Storage. MASCOTS 2013: 328-332 - [c74]Sushil Jajodia, Witold Litwin, Thomas J. E. Schwarz:
Key Recovery Using Noised Secret Sharing with Discounts over Large Clouds. SocialCom 2013: 700-707 - 2012
- [c73]Sushil Jajodia, Witold Litwin, Thomas J. E. Schwarz:
Securing password recovery through dispersion. CASoN 2012: 228-233 - [c72]Sushil Jajodia, Witold Litwin, Thomas J. E. Schwarz:
Recoverable Encryption through Noised Secret over a Large Cloud. Globe 2012: 13-24 - [c71]Zhike Zhang, Deepavali Bhagwat, Witold Litwin, Darrell D. E. Long, Thomas J. E. Schwarz:
Improved deduplication through parallel Binning. IPCCC 2012: 130-141 - 2011
- [c70]Witold Litwin, Sushil Jajodia, Thomas J. E. Schwarz:
Privacy of data outsourced to a cloud for selected readers through client-side encryption. WPES 2011: 171-176 - 2010
- [c69]Sushil Jajodia, Witold Litwin, Thomas J. E. Schwarz:
LH*RE: A Scalable Distributed Data Structure with Recoverable Encryption. IEEE CLOUD 2010: 354-361
2000 – 2009
- 2009
- [j19]Cédric du Mouza, Witold Litwin, Philippe Rigaux:
Large-scale indexing of spatial data in distributed repositories: the SD-Rtree. VLDB J. 18(4): 933-958 (2009) - [c68]Cédric du Mouza, Witold Litwin, Philippe Rigaux, Thomas J. E. Schwarz:
AS-index: a structure for string search using n-grams and algebraic signatures. CIKM 2009: 295-304 - 2008
- [c67]Soror Sahri, Witold Litwin, Thomas J. E. Schwarz:
Scalable web services interface for SD-SQL server. Infoscale 2008: 9 - [c66]Witold Litwin, Hanafi Yakouben, Thomas J. E. Schwarz:
LH*RSP2P: a scalable distributed data structure for P2P environment. NOTERE 2008: 1:1-1:6 - 2007
- [c65]Cédric du Mouza, Witold Litwin, Philippe Rigaux:
A Framework for Distributed Spatial Indexing in Shared-Nothing Architectures. BDA 2007 - [c64]Witold Litwin:
LH*P2Prs : Une structure de données scalable et distribuée pour l'environnement P2P. EDA 2007: 3-4 - [c63]Cédric du Mouza, Witold Litwin, Philippe Rigaux:
Dynamic storage balancing in a distributed spatial index. GIS 2007: 5 - [c62]Cédric du Mouza, Witold Litwin, Philippe Rigaux:
SD-Rtree: A Scalable Distributed Rtree. ICDE 2007: 296-305 - [c61]Witold Litwin, Riad Mokadem, Philippe Rigaux, Thomas J. E. Schwarz:
Fast nGram-Based String Search Over Data Encoded Using Algebraic Signatures. VLDB 2007: 207-218 - 2006
- [c60]Witold Litwin, Soror Sahri, Thomas J. E. Schwarz:
An Overview of a Scalable Distributed Database System SD-SQL Server. BNCOD 2006: 16-35 - [c59]Witold Litwin, Soror Sahri, Thomas J. E. Schwarz:
Architecture and Interface of Scalable Distributed Database System SD-SQL Server. Databases and Applications 2006: 182-187 - [c58]Witold Litwin, Riad Mokadem, Philippe Rigaux, Thomas J. E. Schwarz:
Pattern Matching Using n-Gram Sampling of Cumulative Algebraic Signatures: Preliminary Results. DEXA Workshops 2006: 251-255 - [c57]Riad Mokadem, Witold Litwin:
String-Matching and Update through Algebraic Signatures in Scalable Distributed Data Structures. DEXA Workshops 2006: 708-711 - [c56]Thomas J. E. Schwarz, Peter Tsui, Witold Litwin:
An Encrypted, Content Searchable Scalable Distributed Data Structure. ICDE Workshops 2006: 18 - 2005
- [j18]Witold Litwin, Rim Moussa, Thomas J. E. Schwarz:
LH*RS - a highly-available scalable distributed data structure. ACM Trans. Database Syst. 30(3): 769-811 (2005) - [c55]Witold Litwin:
Galois Connections, T-CUBES, and P2P Data Mining. DBISP2P 2005: 1-12 - [c54]Witold Litwin, Riad Mokadem, Thomas J. E. Schwarz:
Cumulative Algebraic Signatures for Fast String Search, Protection Against Incidental Viewing and Corruption of Data in an SDDS. DBISP2P 2005: 155-162 - 2004
- [c53]Witold Litwin:
Explicit and Implicit LIST Aggregate Function for Relational Databases. Databases and Applications 2004: 185-190 - [c52]Witold Litwin, Thomas J. E. Schwarz:
Algebraic Signatures for Scalable Distributed Data Structures. ICDE 2004: 412-423 - [c51]Witold Litwin, Rim Moussa, Thomas J. E. Schwarz:
LH*RS: A Highly Available Distributed Data Storage. VLDB 2004: 1289-1292 - 2003
- [c50]Qin Xin, Ethan L. Miller, Thomas J. E. Schwarz, Darrell D. E. Long, Scott A. Brandt, Witold Litwin:
Reliability Mechanisms for Very Large Storage Systems. IEEE Symposium on Mass Storage Systems 2003: 146-156 - 2002
- [j17]Witold Litwin, Tore Risch:
LH*G: A High-Availability Scalable Distributed Data Structure By Record Grouping. IEEE Trans. Knowl. Data Eng. 14(4): 923-927 (2002) - [c49]Witold Litwin, Gérard Lévy:
Introduction: Distributed Data & Structures 4. WDAS 2002 - [c48]Mouhamed Tidiane Seck, Samba Ndiaye, Ibrahima Elimane Kane, Witold Litwin:
Deadlock and Livelock Free Concurrency Control by Value Dates for Scalable Distributed Data Structures. WDAS 2002: 59-74 - [c47]Rim Moussa, Witold Litwin:
Experimental Performance Analysis of LH*RS Parity Management. WDAS 2002: 87-98 - [e7]Witold Litwin, Gérard Lévy:
Distributed Data & Structures 4, Records of the 4th International Meeting (WDAS 2002), Paris, France, March 20-23, 2002. Proceedings in Informatics 14, Carleton Scientific 2002, ISBN 1-894145-13-5 [contents] - 2001
- [c46]Yakham Ndiaye, Aly Wane Diene, Witold Litwin, Tore Risch:
AMOS-SDDS: A Scalable Distributed Data Manager for Windows Multicomputers. PDCS 2001: 523- - 2000
- [c45]Witold Litwin, Thomas J. E. Schwarz:
LH*RS: A High-Availability Scalable Distributed Data Structure using Reed Solomon Codes. SIGMOD Conference 2000: 237-248 - [c44]Witold Litwin, Jai Menon:
Scalable Distributed Log Structured Arrays. WDAS 2000: 25-43 - [c43]Yakham Ndiaye, Aly Wane Diene, Witold Litwin, Tore Risch:
Scalable Distributed Data Structures for High-Performance Databases. WDAS 2000: 45-69
1990 – 1999
- 1999
- [c42]Witold Litwin, Jai Menon, Tore Risch, Thomas J. E. Schwarz:
Design Issues for Scalable Availability LH* Schemes with Recor Grouping. WDAS 1999: 38-55 - 1998
- [e6]Witold Litwin, Tadeusz Morzy, Gottfried Vossen:
Advances in Databases and Information Systems, Second East European Symposium, ADBIS'98, Poznan, Poland, September 7-10, 1998, Proceedings. Lecture Notes in Computer Science 1475, Springer 1998, ISBN 3-540-64924-7 [contents] - 1997
- [c41]Witold Litwin, Marie-Anne Neimat:
LH*s: A High-Availability and High-Security Scalable Distributed Data Structure. RIDE 1997: 141-150 - 1996
- [j16]Witold Litwin, Marie-Anne Neimat, Donovan A. Schneider:
LH* - A Scalable, Distributed Data Structure. ACM Trans. Database Syst. 21(4): 480-525 (1996) - [j15]Michael Stonebraker, Paul M. Aoki, Witold Litwin, Avi Pfeffer, Adam Sah, Jeff Sidell, Carl Staelin, Andrew Yu:
Mariposa: A Wide-Area Distributed Database System. VLDB J. 5(1): 48-63 (1996) - [c40]Witold Litwin, Marie-Anne Neimat:
High-Availability LH* Schemes with Mirroring. CoopIS 1996: 196-205 - [c39]Jonas S. Karlsson, Witold Litwin, Tore Risch:
LH*LH: A scalable High Performance Data Structure for Switched Multicomputers. EDBT 1996: 573-591 - [c38]Witold Litwin, Marie-Anne Neimat:
k-RP*S: A Scalable Distributed Data Structure for High-Performance Multi-Attribute Access. PDIS 1996: 120-131 - 1994
- [j14]Dimitrios Georgakopoulos, Marek Rusinkiewicz, Witold Litwin:
Chronological Scheduling of Transactions with Temporal Dependencies. VLDB J. 3(1): 1-28 (1994) - [c37]Michael Stonebraker, Paul M. Aoki, Robert Devine, Witold Litwin, Michael A. Olson:
Mariposa: A New Architecture for Distributed Data. ICDE 1994: 54-65 - [c36]Michael Stonebraker, Robert Devine, Marcel Kornacker, Witold Litwin, Avi Pfeffer, Adam Sah, Carl Staelin:
An Economic Paradigm for Query Processing and Data Migration in Mariposa. PDIS 1994: 58-67 - [c35]Witold Litwin, Marie-Anne Neimat, Donovan A. Schneider:
RP*: A Family of Order Preserving Scalable Distributed Data Structures. VLDB 1994: 342-353 - [e5]Witold Litwin, Tore Risch:
Applications of Databases, First International Conference, ADB-94, Vadstena, Sweden, June 21-23, 1994, Proceedings. Lecture Notes in Computer Science 819, Springer 1994, ISBN 3-540-58183-9 [contents] - 1993
- [j13]John Grant, Witold Litwin, Nick Roussopoulos, Timos K. Sellis:
Query Languages for Relational Multidatabases. VLDB J. 2(2): 153-171 (1993) - [c34]Witold Litwin, Tomasz Imielinski, David B. Lomet, Marie-Anne Neimat:
Panel: Highways and Jukeboxes: A Revolution for Data Structures? FODO 1993: 264 - [c33]L. Suardi, Marek Rusinkiewicz, Witold Litwin:
Execution of Extended Multidatabase SQL. ICDE 1993: 641-650 - [c32]Witold Litwin, Marie-Anne Neimat, Donovan A. Schneider:
LH* - A Tool for Interoperability at the File Access Level. RIDE-IMS 1993: 115-118 - [c31]Rafi Ahmed, Joseph Albert, Weimin Du, William Kent, Witold Litwin, Ming-Chien Shan:
An Overview of Pegasus. RIDE-IMS 1993: 273-277 - [c30]Witold Litwin, Marie-Anne Neimat, Donovan A. Schneider:
LH* - Linear Hashing for Distributed Files. SIGMOD Conference 1993: 327-336 - [p1]Gio Wiederhold, Sushil Jajodia, Witold Litwin:
Integrating Temporal Data in a Heterogeneous Environment. Temporal Databases 1993: 563-579 - 1992
- [j12]Witold Litwin, Tore Risch:
Main Memory Oriented Optimization of OO Queries Using Typed Datalog with Foreign Predicates. IEEE Trans. Knowl. Data Eng. 4(6): 517-528 (1992) - [c29]Witold Litwin:
O*SQL: A Language for Object Oriented Multidatabase Interoperability. DS-5 1992: 119-137 - [c28]Jan Chomicki, Witold Litwin:
Declarative Definition of Object-Oriented Multidatabase Mappings. IWDOM 1992: 375-392 - 1991
- [j11]Rafi Ahmed, Philippe De Smedt, Weimin Du, William Kent, Mohammad A. Ketabchi, Witold Litwin, Abbas Rafii, Ming-Chien Shan:
The Pegasus Heterogeneous Multidatabase System. Computer 24(12): 19-27 (1991) - [j10]Witold Litwin, Mohammad A. Ketabchi, Ravi Krishnamurthy:
First Order Normal Form for Relational Databases and Multidatabases. SIGMOD Rec. 20(4): 74-76 (1991) - [j9]Witold Litwin, Nick Roussopoulos, Gérald Lévy, Wang Hong:
Trie Hashing With Controlled Load. IEEE Trans. Software Eng. 17(7): 678-691 (1991) - [c27]Gio Wiederhold, Sushil Jajodia, Witold Litwin:
Dealing with Granularity of Time in Temporal Databases. CAiSE 1991: 124-140 - [c26]Rafi Ahmed, Philippe De Smedt, William Kent, Mohammad A. Ketabchi, Witold Litwin, Abbas Rafii, Ming-Chien Shan:
Pegasus: a system for seamless integration of heterogeneous information sources. Compcon 1991: 128-136 - [c25]Yuri Breitbart, Witold Litwin, Avi Silberschatz:
Deadlock problems in a multidatabase environment. Compcon 1991: 145-151 - [c24]Byung Suk Lee, Witold Litwin, Gio Wiederhold:
Implicit joins in the structural data model. COMPSAC 1991: 357-364 - [c23]Ravi Krishnamurthy, Witold Litwin, William Kent:
Interoperability of Heterogeneous Databases with Schematic Discrepancies. RIDE-IMS 1991: 144-155 - [c22]Ravi Krishnamurthy, Witold Litwin, William Kent:
Language Features for Interoperability of Databases with Schematic Discrepancies. SIGMOD Conference 1991: 40-49 - [c21]Yuri Breitbart, Hector Garcia-Molina, Witold Litwin, Nick Roussopoulos, Hans-Jörg Schek, Gio Wiederhold:
Interoperability In Multidatabases: Semantic and System Issues (Panel). VLDB 1991: 561 - 1990
- [j8]Witold Litwin, Leo Mark, Nick Roussopoulos:
Interoperability of Multiple Autonomous Databases. ACM Comput. Surv. 22(3): 267-293 (1990) - [j7]Marek Rusinkiewicz, Ahmed K. Elmagarmid, Yungho Leu, Witold Litwin:
Extending the Transaction Model to Capture more Meaning. SIGMOD Rec. 19(1): 3-7 (1990) - [c20]Ahmed K. Elmagarmid, Yungho Leu, Witold Litwin, Marek Rusinkiewicz:
A Multidatabase Transaction Model for InterBase. VLDB 1990: 507-518
1980 – 1989
- 1989
- [j6]Witold Litwin, Yehoshua Sagiv, K. Vidyasankar:
Concurrency and Trie Hashing. Acta Informatica 26(7): 597-614 (1989) - [j5]Witold Litwin, Abdellaziz Abdellatif, Abdelmalek Zeroual, Bertrand Nicolas, Philippe Vigier:
MSQL: A Multidatabase Language. Inf. Sci. 49(1-3): 59-101 (1989) - [e4]Witold Litwin, Hans-Jörg Schek:
Foundations of Data Organization and Algorithms, 3rd International Conference, FODO 1989, Paris, France, June 21-23, 1989, Proceedings. Lecture Notes in Computer Science 367, Springer 1989, ISBN 3-540-51295-0 [contents] - 1988
- [c19]Witold Litwin:
From Database Systems to Multidatabase Systems: Why and How. BNCOD 1988: 161-188 - [c18]Witold Litwin, Djamel Eddine Zegour, Gérard Lévy:
Multilevel Trie Hashing. EDBT 1988: 309-335 - 1987
- [j4]Witold Litwin, Abdelaziz Abdellatif:
An overview of the multi-database manipulation language MDSL. Proc. IEEE 75(5): 621-632 (1987) - [j3]Witold Litwin, David B. Lomet:
A New Method for Fast Data Searches with Keys. IEEE Softw. 4(2): 16-24 (1987) - [c17]Witold Litwin:
The future of heterogeneous databases. FJCC 1987: 751-752 - 1986
- [j2]Witold Litwin, Abdelaziz Abdellatif:
Multidatabase Interoperability. Computer 19(12): 10-18 (1986) - [c16]Witold Litwin, David B. Lomet:
The Bounded Disorder Access Method. ICDE 1986: 38-48 - [c15]Witold Litwin, Philippe Vigier:
Dynamic Attributes in the Multidatabase System MRDSM. ICDE 1986: 103-110 - 1985
- [c14]Witold Litwin:
An Overview of the Multidatabase System MRDSM. ACM Annual Conference 1985: 524-533 - [c13]Witold Litwin:
Jointures implicites dans le sysème MRDSM. BDA 1985 - [c12]Witold Litwin:
TRIE Hashing: Further Properties and Performance. FODO 1985: 77-90 - 1984
- [c11]Witold Litwin:
MALPHA: A Relational Multidatabase Manipulation Language. ICDE 1984: 86-93 - [e3]Reind P. van de Riet, Witold Litwin:
Distributed Data Sharing Systems, Proceedings of the Third International Seminar on Distributed Data Sharing Systems, DDSS 1984, Parma, Italy, 28-30 March, 1984. North-Holland 1984, ISBN 0-444-87637-5 [contents] - 1983
- [c10]Yuri Breitbart, Umeshwar Dayal, James P. Fry, Witold Litwin, Amihai Motro:
Issues in Multiple Database Environmemnts (Panel). ER 1983: 807-808 - 1982
- [j1]A. M. Glorieux, Witold Litwin:
Distributed Data User's Needs: Experience from some SIRIUS Project Prototypes. IEEE Database Eng. Bull. 5(4): 23-27 (1982) - [c9]Witold Litwin, J. Boudenant, Christian Esculier, Arlette Ferrier, A. M. Glorieux, J. La Chimia, K. Kabbaj, Catherine Moulinoux, P. Rolin, Christine Stangret:
SIRIUS System for Distributed Data Management. DDB 1982: 311-366 - [c8]Catherine Moulinoux, Jean-Claude Faure, Witold Litwin:
Messidor: A Distributed Information Retrieval Systems. SIGIR 1982: 51-61 - 1981
- [c7]Witold Litwin:
Logical Model of a Distributed Data Base. DDSS 1981: 173-208 - [c6]Witold Litwin:
Trie Hashing. SIGMOD Conference 1981: 19-29 - [c5]Catherine Moulinoux, Jean-Claude Faure, Witold Litwin:
MESSIDOR System. SIGSMALL/SIGMOD Symposium 1981: 130-135 - [e2]Reind P. van de Riet, Witold Litwin:
Distributed Data Sharing Systems, Proceedings of the Second International Seminar on Distributed Data Sharing Systems, DDSS 1981, Amsterdam, The Netherlands, 3-5 June, 1981. North-Holland 1981, ISBN 0-444-86374-5 [contents] - 1980
- [c4]Witold Litwin:
Linear Hashing: A new Algorithm for Files and Tables Addressing. ICOD 1980: 260-276 - [c3]Jean Le Bihan, Christian Esculier, Gérard Le Lann, Witold Litwin, Georges Gardarin, S. Sedillort, L. Treille:
SIRIUS: A French Nationwide Project on Distributed Data Bases. VLDB 1980: 75-85 - [c2]Witold Litwin:
Linear Hashing: A New Tool for File and Table Addressing. VLDB 1980: 212-223 - [e1]Claude Delobel, Witold Litwin:
Proceedings of the International Symposium on Distributed Data Bases, Paris, France, March 12-14, 1980. North-Holland Publishing Company 1980, ISBN 0-444-85471-1 [contents]
1970 – 1979
- 1978
- [c1]Witold Litwin:
Virtual Hashing: A Dynamically Changing Hashing. VLDB 1978: 517-523
Coauthor Index
manage site settings
To protect your privacy, all features that rely on external API calls from your browser are turned off by default. You need to opt-in for them to become active. All settings here will be stored as cookies with your web browser. For more information see our F.A.Q.
Unpaywalled article links
Add open access links from to the list of external document links (if available).
Privacy notice: By enabling the option above, your browser will contact the API of unpaywall.org to load hyperlinks to open access articles. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the Unpaywall privacy policy.
Archived links via Wayback Machine
For web page which are no longer available, try to retrieve content from the of the Internet Archive (if available).
Privacy notice: By enabling the option above, your browser will contact the API of archive.org to check for archived content of web pages that are no longer available. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the Internet Archive privacy policy.
Reference lists
Add a list of references from , , and to record detail pages.
load references from crossref.org and opencitations.net
Privacy notice: By enabling the option above, your browser will contact the APIs of crossref.org, opencitations.net, and semanticscholar.org to load article reference information. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the Crossref privacy policy and the OpenCitations privacy policy, as well as the AI2 Privacy Policy covering Semantic Scholar.
Citation data
Add a list of citing articles from and to record detail pages.
load citations from opencitations.net
Privacy notice: By enabling the option above, your browser will contact the API of opencitations.net and semanticscholar.org to load citation information. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the OpenCitations privacy policy as well as the AI2 Privacy Policy covering Semantic Scholar.
OpenAlex data
Load additional information about publications from .
Privacy notice: By enabling the option above, your browser will contact the API of openalex.org to load additional information. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the information given by OpenAlex.
last updated on 2024-07-20 20:30 CEST by the dblp team
all metadata released as open data under CC0 1.0 license
see also: Terms of Use | Privacy Policy | Imprint