DIG35 Specification: Metadata for Digital Images. Version 1.0

Chapter 4:DIG35 Implementation Definitions DIG35 Specification 2000-08-30Three namespace abbreviations are used throughout this specification. These namespaces are for XML, XML Schema andDIG35 definitions.The XML namespace:xmlns:xml="http://www.w3.org/XML/1998/namespace"The XML Schema namespace:xmlns:xsd="http://www.w3.org/1999/XMLSchema"To specify the DIG35 XML namespace the following URI is defined. It should be used by experimental implementations:xmlns:dig35="http://www.digitalimaging.org/dig35/1.0/xml"4.1.3 Syntax ConventionsIn this specification, several syntax conventions are used. Table 4-1 summarizes the syntax conventions used in the DIG35recommended XML implementation. Additionally, examples of encoding of the metadata are described in XML. Note that forreadability purposes, most examples are well formed XML focused on fields that are related to the metadata definition.Table 4-1: Syntax conventionsDIG35 defined typesXML elements andattributesEnumerated valuesDescriptionDIG35 defined type name starts with “t” prefix.Following the prefix, subsequent words shallbegin with an upper-case letter. Multiple wordsare combined without spaces in between.All names shall use all upper case letters.Subsequent words shall be connected by anunderscore ('_').All words begin with upper case letter. Multiplewords are combined with a space (‘ ‘).ExampletDateTimeGENERAL_INFODigital Camera4.1.4 ExtensibilityThis specification defines public metadata that is applicable to general images. Thus, its coverage may not be enough for aparticular application domain that needs further detail to be stored. DIG35 metadata documents therefore should allowadditional elements to be embedded, keeping the integrity of the overall framework, allowing private metadata to be'plugged-in' that only a particular systems may be able to understand and use such information.Version 1.0 © 2000 Digital Imaging Group, Inc. 13