MAG2RDF

MAG2RDF contains the code for generating the Microsoft Academic Knowledge Graph (MAKG) in RDF.

For more information, see The Microsoft Academic Knowledge Graph: A Linked Data Source with 8 Billion Triples of Scholarly Data.

The main class is MAG2RDF.

Input

The generation of the MAKG RDF data requires to have the data dump files of the Microsoft Academic Graph. Specifically, the following files are needed:

• Affiliations.txt

• Authors.txt

• ConferenceInstances.txt

• ConferenceSeries.txt

• FieldOfStudyChildren.txt

• RelatedFieldOfStudy.txt

• FieldsOFStudy.txt

• Journals.txt

• PaperAbstractsInvertedIndex.txt

• PaperAuthorAffiliations.txt

• PaperCitationContexts.txt

• PaperFieldsOfStudy.txt

• PaperLanguages.txt

• PaperReferences.txtA. MAG Dump-Files:

  1. Affiliations.txt.nt i. Wiki articles were expected to be https. A conversion of wiki to dbpedia was not achieved. FIXED ii. Created date is now in column 12 (previously 10)

  2. ConferenceInstances.txt.nt i. Created date is now in column 17 (previously 15)

  3. FieldOfStudyRelationship.txt.nt i. Entity two is now in column 3 (previously 4) ii. Type one is now in column 2 (previously 3) iii. Type two is now in column 4 (previously 6)

  4. Journals.txt.nt i. Created date is now in column 23 (previously 22)

  5. PaperLanguages.txt.nt i. File doesn't exist anymore. If a paper has a tagged language, the language can be found in column 4 of PaperUrls.txt.

B: MAG2RDF Code:

1. textannotation/TullTextAnnotationClientXML
	i.   Line 113: Changed 'new ByteArrayInputStream(xmlstring.getBytes())' to 'new ByteArrayInputStream(xmlstring.getBytes(Charsets.UTF_8))'
	ii.  Line 263: Changed '.type(MediaType.APPLICATION_XML)' to '.type(MediaType.APPLICATION_XML + "; charset=UTF-8")'

• Papers.txt
• PaperUrls.txt

To obtain these files, please follow the instructions at https://docs.microsoft.com/en-us/academic-services/graph/get-started-setup-provisioning.

Processing

Compile MAG2RDF.java, create the corresponding jar file and run

java MAG2RDF.jar

Output

For each input file, the program creates a corresponding output file in the RDF format:

• Affiliations.txt.nt
• Authors.txt.nt
• ConferenceInstances.txt.nt
• ConferenceSeries.txt.nt
• FieldOfStudyChildren.txt.nt
• RelatedFieldOfStudy.txt.nt
• FieldsOFStudy.txt.nt
• Journals.txt.nt
• PaperAbstractsInvertedIndex.txt.nt
• PaperAuthorAffiliations.txt.nt
• PaperCitationContexts.txt.nt
• PaperFieldsOfStudy.txt.nt
• PaperLanguages.txt.nt
• PaperReferences.txt.nt
• Papers.txt.nt
• PaperUrls.txt.nt

Contact & More Information

More information can be found in my ISWC'19 paper The Microsoft Academic Knowledge Graph: A Linked Data Source with 8 Billion Triples of Scholarly Data.

Feel free to reach out to me in case of questions or comments:

Michael Färber, michael.faerber@kit.edu

How to Cite

Please cite my work (described in this paper) as follows:

@inproceedings{DBLP:conf/semweb/Farber19,
  author    = {Michael F{\"{a}}rber},
  title     = "{The Microsoft Academic Knowledge Graph: {A} Linked Data Source with
               8 Billion Triples of Scholarly Data}",
  booktitle = "{Proceedings of the 18th International Semantic Web Conference}",
  series    = "{ISWC'19}",
  location  = "{Auckland, New Zealand}",
  pages     = {113--129},
  year      = {2019},
  url       = {https://doi.org/10.1007/978-3-030-30796-7\_8},
  doi       = {10.1007/978-3-030-30796-7\_8}
}

Last Major Updates

• 2020-07-09
• 2019-07-15

Changes for Version 2020-07-09

A. MAG Dump-Files:

	1. Affiliations.txt.nt
		i.   Wiki articles were expected to be https. A conversion of wiki to dbpedia was not achieved. FIXED
		ii.  Created date is now in column 12 (previously 10)
		
	2. ConferenceInstances.txt.nt
		i.   Created date is now in column 17 (previously 15)
		
	3. FieldOfStudyRelationship.txt.nt
		i.   Entity two is now in column 3 (previously 4)
		ii.  Type one is now in column 2 (previously 3)
		iii. Type two is now in column 4 (previously 6)
		
	4. Journals.txt.nt
		i.   Created date is now in column 23 (previously 22)
		
	5. PaperLanguages.txt.nt
		i.   File doesn't exist anymore. If a paper has a tagged language, the language can be found in column 4 of PaperUrls.txt.
		
B: MAG2RDF Code:

	1. textannotation/TullTextAnnotationClientXML
		i.   Line 113: Changed 'new ByteArrayInputStream(xmlstring.getBytes())' to 'new ByteArrayInputStream(xmlstring.getBytes(Charsets.UTF_8))'
		ii.  Line 263: Changed '.type(MediaType.APPLICATION_XML)' to '.type(MediaType.APPLICATION_XML + "; charset=UTF-8")'