Class information for:
Level 2: ACM TRANSACTIONS ON DATABASE SYSTEMS//QUERY OPTIMIZATION//INFORMATION SYSTEMS

Basic class information
Bar chart of Publication_year

Last years might be incomplete

Hierarchy of classes
The table includes all classes above and classes immediately below the current class.


Cluster id Level Cluster label #P
12 4 COMPUTER SCIENCE, THEORY & METHODS//COMPUTER SCIENCE, INFORMATION SYSTEMS//COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE 1181119
31 3       COMPUTER SCIENCE, SOFTWARE ENGINEERING//COMPUTER SCIENCE, INFORMATION SYSTEMS//COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE 113161
1270 2             ACM TRANSACTIONS ON DATABASE SYSTEMS//QUERY OPTIMIZATION//INFORMATION SYSTEMS 9106
5708 1                   FUNCTIONAL DEPENDENCY//CONSISTENT QUERY ANSWERING//ACM TRANSACTIONS ON DATABASE SYSTEMS 1616
10483 1                   QUERY OPTIMIZATION//MULTIPLE QUERY OPTIMIZATION//PARALLEL QUERY PROCESSING 1089
11154 1                   XML//XPATH//KEYWORD SEARCH 1031
11486 1                   FUNCTIONAL DATA MODEL//OBJECT ROLE MODELING//OBJECT ORIENTED DATABASES 1005
14196 1                   DATA WAREHOUSE//OLAP//DATA WAREHOUSING 817
15283 1                   FINITE MODEL THEORY//DESCRIPTIVE COMPLEXITY//CONSTRAINT DATABASES 747
17737 1                   TEMPORAL DATABASES//TRANSACTION TIME//VALID TIME 613
18035 1                   SCHEMA INTEGRATION//HETEROGENEOUS DATABASES//MULTIDATABASE 596
18693 1                   HEAVY HITTERS//DATA SYNOPSES//DATA STREAMS 564
22542 1                   ACTIVE DATABASES//ACTIVE DATABASE SYSTEMS//REAL TIME DECISION SYSTEMS 400
24704 1                   DATA STREAM PROCESSING//CONTINUOUS QUERIES//STREAM PROCESSING 327
28590 1                   RECURSIVE QUERY PROCESSING//DEDUCTIVE DATABASES//RECURSIVE QUERY EVALUATION 222
37615 1                   RELATIONAL TRANSDUCER//CLOUD PROGRAMMING//INTERNET BASED COMMERCE 79

Terms with highest relevance score


rank Category termType chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 ACM TRANSACTIONS ON DATABASE SYSTEMS journal 525887 4% 44% 348
2 QUERY OPTIMIZATION authKW 384359 2% 61% 182
3 INFORMATION SYSTEMS journal 376054 4% 27% 404
4 XML authKW 347475 4% 28% 358
5 COMPUTER SCIENCE, INFORMATION SYSTEMS WoSSC 342795 51% 2% 4608
6 DATA WAREHOUSE authKW 286138 2% 45% 184
7 TEMPORAL DATABASES authKW 255347 1% 65% 114
8 OLAP authKW 248387 1% 57% 126
9 FUNCTIONAL DEPENDENCY authKW 230475 1% 62% 108
10 QUERY PROCESSING authKW 202129 2% 31% 190

Web of Science journal categories


chi_square_rank Category chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 Computer Science, Information Systems 342795 51% 2% 4608
2 Computer Science, Theory & Methods 181910 39% 2% 3535
3 Computer Science, Software Engineering 116893 26% 1% 2397
4 Computer Science, Artificial Intelligence 42714 18% 1% 1672
5 Computer Science, Hardware & Architecture 38346 12% 1% 1072
6 Logic 11503 3% 2% 229
7 COMPUTER APPLICATIONS & CYBERNETICS 2585 0% 2% 45
8 Engineering, Electrical & Electronic 1430 10% 0% 907
9 Information Science & Library Science 994 2% 0% 170
10 Mathematics, Applied 951 5% 0% 492

Address terms


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 COMP SCI 60702 19% 1% 1694
2 LUCENTIA GRP 38438 0% 65% 17
3 SOFTWARE COMP SYST 25703 0% 30% 25
4 INTEROPERABLE SYST GRP 17788 0% 86% 6
5 WNI 17026 0% 19% 26
6 GSCIT 13833 0% 67% 6
7 LIAS ISAE ENSMA 12351 0% 71% 5
8 MOSTRARE PROJECT 11315 0% 55% 6
9 INFORMAT LANGUAGES SYST 11068 0% 80% 4
10 UPPSALA DATABASE 11068 0% 80% 4

Journals


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 ACM TRANSACTIONS ON DATABASE SYSTEMS 525887 4% 44% 348
2 INFORMATION SYSTEMS 376054 4% 27% 404
3 DATA & KNOWLEDGE ENGINEERING 170901 3% 20% 248
4 IEEE TRANSACTIONS ON KNOWLEDGE AND DATA ENGINEERING 160394 4% 12% 382
5 SIGMOD RECORD 146945 2% 27% 156
6 LECTURE NOTES IN COMPUTER SCIENCE 144281 21% 2% 1929
7 VLDB JOURNAL 140637 2% 26% 158
8 DISTRIBUTED AND PARALLEL DATABASES 58975 1% 21% 81
9 JOURNAL OF COMPUTER AND SYSTEM SCIENCES 50864 2% 8% 182
10 INTERNATIONAL JOURNAL OF DATA WAREHOUSING AND MINING 50676 0% 33% 44

Author Key Words


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass LCSH search Wikipedia search
1 QUERY OPTIMIZATION 384359 2% 61% 182 Search QUERY+OPTIMIZATION Search QUERY+OPTIMIZATION
2 XML 347475 4% 28% 358 Search XML Search XML
3 DATA WAREHOUSE 286138 2% 45% 184 Search DATA+WAREHOUSE Search DATA+WAREHOUSE
4 TEMPORAL DATABASES 255347 1% 65% 114 Search TEMPORAL+DATABASES Search TEMPORAL+DATABASES
5 OLAP 248387 1% 57% 126 Search OLAP Search OLAP
6 FUNCTIONAL DEPENDENCY 230475 1% 62% 108 Search FUNCTIONAL+DEPENDENCY Search FUNCTIONAL+DEPENDENCY
7 QUERY PROCESSING 202129 2% 31% 190 Search QUERY+PROCESSING Search QUERY+PROCESSING
8 QUERY LANGUAGES 189851 1% 45% 122 Search QUERY+LANGUAGES Search QUERY+LANGUAGES
9 RELATIONAL DATABASE 177564 2% 30% 174 Search RELATIONAL+DATABASE Search RELATIONAL+DATABASE
10 DATA WAREHOUSING 157322 1% 51% 90 Search DATA+WAREHOUSING Search DATA+WAREHOUSING

Core articles
The table includes core articles in the class. The following variables is taken into account for the relevance score of an article in a cluster c:
(1) Number of references referring to publications in the class.
(2) Share of total number of active references referring to publications in the class.
(3) Age of the article. New articles get higher score than old articles.
(4) Citation rate, normalized to year.

Classes with closest relation at Level 2


rank cluster_id2 link
1 1934 FORMAL CONCEPT ANALYSIS//CONCEPT LATTICE//SEMANTIC WEB
2 2509 SPATIAL DATABASES//DATA BROADCASTING//SKYLINE QUERY
3 2109 NONMONOTONIC REASONING//ANSWER SET PROGRAMMING//BELIEF REVISION
4 1534 SELF STABILIZATION//DISTRIBUTED COMPUTING//FAULT TOLERANCE
5 2387 SERVICE COMPOSITION//PROCESS MINING//WEB SERVICES
6 170 COMPUTER SCIENCE, SOFTWARE ENGINEERING//INFORMATION AND SOFTWARE TECHNOLOGY//IEEE SOFTWARE
7 2527 CONSTRAINTS//PROOF COMPLEXITY//BOUNDED ARITHMETIC
8 1551 INTERNATIONAL JOURNAL OF GEOGRAPHICAL INFORMATION SCIENCE//CARTOGRAPHIC JOURNAL//QUALITATIVE SPATIAL REASONING
9 1624 CLOUD COMPUTING//VIRTUALIZATION//MAPREDUCE
10 1649 THEORETICAL COMPUTER SCIENCE//FORMAL LANGUAGES//DESCRIPTIONAL COMPLEXITY

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