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What is the .DSD File Extension?

.DSD File Extension Description:

The Document Structure Description (DSD) is designed as an alternative schema language to DTD (Document Type Definition) for describing classes of XML (Extensible Markup Language) documents. The schema language is the document used for defining a set of XML trees. It generates like the mechanism of CSS (Cascading Style Sheets), which is independent of its formatting models.

The file with the .dsd file extension is itself an XML document. It is associated to an application document by putting a special processing instruction in the form of <?dsd URI="URI"?> where URI is the location of the file with the .dsd file extension.

The DSD file extension contains a number of definitions with each related to an ID that can be used for reference so it can be reused and redefined. One of these is the element definition that classifies a pair of constraint and element name during the application document processing. The ID element definition can only be assigned of the same name, thus it is not used as non-terminals in context-free grammars.

An example of a file with the .dsd file extension is a database file that contains data about books such as authors, titles, ISBN numbers, etc. Each book entry as well as the entire database contains a title element with different structure, meaning book entry titles can only contain chardata without markup whereas database titles can contain arbitrary content without attributes.

The XML grammar's parameterization can be found in the file with the .dsd file extension itself. Additionally, it can impose points-to requirement on the element, which is denoted by the reference. This requirement is defined by a Boolean expression allowing description of semi-structured data.

DSD supports the creation of a schema from an existing schema through modifications and extensions through the provision of two simple mechanisms known as redefinition and inclusion. Inclusion is a special "include" processing instruction of the form <?include URI="URI"?> where URI stands for the document to be inserted in place of the processing instruction. Redefinition means renewing all the definitions of a concept included in the document.

The use of a DSD processor as a front-end for other XML tools is a technique that uses the meta-DSD where a given file with the .dsd file extension is certainly a valid DSD. Subsequently, when the file with the .dsd file extension is used to check the actual application documents, the processor thinks it is valid. This technique reduced the size of the implementation making it more readable.

Author: Nils Klarlund, Anders Moller, Michael Schwartzbach
Author URL:
Related Applications: DSD
Common Path: N/A


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What Causes .DSD files Errors to Occur?

A typical and frequent explanation for .DSD files errors is damage in the Windows program registry - fixing is needed to protect against additional harm in other applications and/or devices. Receiving these errors puts your personal computer in danger for fatal crashes, blue screen errors as well as hardware failure.

.DSD files Errors - Common Symptoms:

.DSD files error symptoms include program lock ups, start up or shut down troubles, jerky computer performance, sluggish behaviour, screen freeze, beeping sounds, problems loading program files and errors while installing programs.

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