Specifications

Glossary-28
X.500
AstandardoftheInternationalOrganizationforStandardization(ISO)and International
TelecommunicationsUnionTelecommunicationStandardizationSector(ITU‐T),forsystematically
collectingthenamesofpeopleinanorganizationintoanelectronicdirectorythatcanbepartofa
globaldirectoryavailabletoanyoneintheworldwithInternetaccess.
X.509
AnInternationalTelecommunicationsUnionTelecommunicationStandardizationSector(ITU‐T)
Recommendationandthemostwidelyusedstandardfordefiningdigitalcertificates.
XML
ExtensibleMarkupLanguage.Asimplerandeasier‐to‐usesubsetoftheStandardGeneralized
MarkupLanguage(SGML),withunlimited,self‐definingmarkupsymbols(tags).Developedby
theWorldWideWebConsortium(W3C),theXMLspecificationprovidesaflexiblewaytocreate
commoninformationformatsandshareboththeformatandthe
dataontheInternet,intranets,and
elsewhere.Designerscancreatetheirowncustomizedtagstodefine,transmit,validate,and
interpretdatabetweenapplicationsandbetweenorganizations.