JSON and Graph model - University of Helsinki
JSON and Graph model
Lecturer: Jiaheng Lu Autumn 2016
helsinki.fi
21.11.2016
1
Review and outline
? History of databases (Why we use databases)
? Data models
? Three features of data models ? Relational model ? Semi-structure model
XML model JSON model
? Graph model
helsinki.fi
Trends in XML and JSON usage
80% 70% 60% 50% 40% 30% 20% 10% 0%
2006 2007 2008 2009
XML JSON
2010 2011 2012 2013
Based on directory of 11,000 web APIs listed at Programmable Web, December 2013
Wow! I better have expertise in both XML and JSON
helsinki.fi
Example of XML-formatted data
The below XML document contains data about a book: its title, authors, date of publication, and publisher.
Parsing Techniques Dick Grune Ceriel J.H. Jacobs 2007 Springer
helsinki.fi
Same data, JSON-formatted
{ "Book": { "Title": "Parsing Techniques", "Authors": [ "Dick Grune", "Ceriel J.H. Jacobs" ], "Date": "2007", "Publisher": "Springer" }
}
helsinki.fi
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