Traditional relational data model cannot meet the demand of big data applications for expressing and processing wide varieties of data.As a result
a number of non-relational data types have become popular in practice
among which JSONlike tree-structured data types have been widely adopted.Tree-structured data types have important theoretical and practical values.A systematic description of tree-structured data types was provided
and the way to efficiently support data analysis operations on tree-structured data was investigated.
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references
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