Digital Preservation Strategies. The Italian Ministry for ...

Digital Preservation Strategies The Italian Ministry for Finance Testbed Marco Rendina [email protected] Consorzio Roma Ricerche Urbino, Italy - 9th-11th October 2002

The Team University of Urbino Consorzio Roma Ricerche Ministry for Finance Income Agency San Diego Supercomputer Center Urbino, Italy - 9th-11th October 2002 The Testbed steps

1. Select a significant set of digital data to preserve 2. Create an XML based representation of this data 3. Ingest this data into the SDSC SRB (Storage Resource Broker) 4. Test the consistency and the reusability of the new ingested data respect to the original ones. Urbino, Italy - 9th-11th October 2002

1. Select a digital data set VSAM data set containing the Tax income return forms for the year 1995 Selected 50,000 records on a total amount of 1,000,000 Urbino, Italy - 9th-11th October 2002

Something about VSAM VSAM - Virtual Storage Access Method is a data management system introduced by IBM in the 1970s as part of the OS/VS1 and OS/VS2 operating systems. VSAM defines a way to organize and access data, and maintain information about this data. VSAM data sets can be accessed using applications written in languages such as COBOL or Assembler

Urbino, Italy - 9th-11th October 2002 The selected VSAM data set Data coded in EBCDIC Data structure expressed by a COBOL declaration (copybook) Significant data structure complexity (hierarchies,

redefinitions, data types) Urbino, Italy - 9th-11th October 2002 2. Create an XML representation of the data Define an XML Schema from the COBOL copybook Convert the EBCDIC data into ASCII data using the copybook informations

Transform the ASCII data into XML tagged data (validated by the defined Schema) Urbino, Italy - 9th-11th October 2002 COBOL copybook XML Schema

Urbino, Italy - 9th-11th October 2002 EBCDIC data ASCII data Urbino, Italy - 9th-11th October 2002 ASCII data

XML marked data Urbino, Italy - 9th-11th October 2002 3. Ingest the XML data into SRB Generate a relational data structure from the defined XML Schema Parse and ingest the XML data into the relational

database Prepare a specific interface for quering and presenting data from SRB in the desired ways (not yet done!!) Urbino, Italy - 9th-11th October 2002 et voil Urbino, Italy - 9th-11th October 2002

Final conclusions Preservation of data (digital object as a bit stream) OK! Preservation of information (tagged data) Mission completed?! or we are missing something? Urbino, Italy - 9th-11th October 2002

OK! The missed ring! Knowledge relationships Logical (relations with other data source) Functional/algorithmic (data analysis and elaborations) Procedural (workflow)

Urbino, Italy - 9th-11th October 2002 Some open questions Do we really need to preserve knowledge? And which is the costs/benefits balance? XML can help us in defining and representing knowledge relationships? Urbino, Italy - 9th-11th October 2002

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