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Data on the Web mostly are in XML format and the need often arises to update their structure, commonly described by an XML Schema. When a schema is modified the effects of the modification on documents need to be faced. XSUpdate is a language that allows to easily identify parts of an XML Schema, apply a modification primitive on them and finally define an adaptation for associated documents, while...
In a dynamic and heterogeneous world as the Web, the need often arises to update XML data, as well as their structures, to adhere to new domain requirements. Updates may break compliance of data to schemas, and updates at schema level may in addition require to adapt associated documents to the new schema. Moreover, emerging application contexts in which updates come from different sources, such as...
Automating the management of data throughout its lifecycle requires solutions to effectively and efficiently handle updates, both on data and on the corresponding schema. Such solutions are especially needed for XML documents and schemata, due to the high dynamicity of the contexts in which they are employed. XML documents need to be kept up-to-date, schemata as well are often subjected to updates...
The concept of heterogeneity is very important in XML data management, since many common applications must deal with large and complex collections which do not conform to a schema. Heterogeneity in XML collections can be present at many different levels (textual and structural) and needs to be addressed from several perspectives. This paper contributes a formal characterization of heterogeneity in...
In this paper we present X-Evolution, a Web system developed on top of a commercial DBMS that allows the specification of schema modifications both on a graphical representation of an XML Schema and through a specifically tailored declarative language. X-Evolution supports facilities for performing schema revalidation only when strictly needed and only on the minimal parts of documents affected by...
This work-in-progress paper describes the features of the ArHeX similarity-oriented XML processing toolkit. ArHeX is designed to assist in the engineering of XML similarity-oriented applications, supporting the design and evaluation of suitable similarity measures and their associated indexes for each specific application.
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