Changes for the Explain-- DTD, version 1.1

Changes between versions 1.0 and 1.1 (Thu, 7 Mar 2002 13:54:04):

Substantive Changes

• It is implicitly acknowledged that this is an SGML DTD.
• Many attributes changed to default to "false" rather than being undefined:
  • The serverInfo element's authentication
  • The host element's primary
  • The index element's search, scan and sort
  • The indexTitle element's primary
  • The map element's primary
• Add new optional subelements to the databaseInfo element:
  • author
  • contact
  • extent
  • history
  • langUsage
  • restrictions
  • subjects
  Each of these has primary (default: "false") and lang attributes; the langUsage element additionally has a codes attribute.
• Add primary and lang attributes to the title and description elements.
• Add attributeSet attribute to elements:
  • use
  • posit
  • struct
  • relat
  • trunc
  • complet (typo here: says compet, no l)

Formatting Changes

• Break apart some compound definitions so that their attribute definitions can stay close to their element definitions:
  • (host|port|database)
  • (title|description)
  • (dateCreated|aggregatedFrom|dateAggregated)
  • (indexTitle|indexType)
  • (use|posit|struct|relat|trunc|access|semantic|language|content| expan|weight|hitcount|compar|occur|indirect|func|complet|form)
• Move the sortKeyword element's definition ahead of map.
• #IMPLIED and #REQUIRED are capitalised throughout.
• Changes to the formatting of comments.
• Changes to the use of whitespace.