General tool guides

• UKOLN-- Metadata Group
  http://www.ukoln.ac.uk/metadata/
  
  
• IFLA --Electronic collections--Digital libraries--metadata resources
  http://www.ifla.org/II/metadata.htm

Specific standard tool guides

• DCMI-- Tools and Software
  http://www.dublincore.org/tools/
  
  
• DSTC-- CORBA Services-- Metadata Tools
  http://www.dstc.edu.au/Products/metaSuite/
  
  
• Nordic Metadata Project (1996-98)
  User Guidelines for Dublin Core Creation -- Nordic Metadata Creation Tool
  http://www.sics.se/~preben/DC/DC_temp_help.html
  
  
• The EAD Toolkit of Online Archive of California (OAC)
  http://www.cdlib.org/inside/projects/oac/toolkit/toolkit_v2002.html
  
  
• MARC 21 website-- MARC Records, Systems and Tools--MARC Specialized Tools
  http://www.loc.gov/marc/marctools.html
  
  
• TEI -- TEI Tools Page
  http://www.tei-c.org/Tools/index.xml
  
  
• CIDOC CRM--Resources--Tools
  http://cidoc.ics.forth.gr/tools.html
  
  
• FGDC Metadata Tools
  http://www.fgdc.gov/metadata/geospatial-metadata-tools
  
  
• OAI-Specific Tools
  http://www.openarchives.org/tools/tools.html
  
  
• W3C --XML（Extensible Markup Language）
  http://www.w3.org/XML/