• Meta-Tags, simplest kind:

  <META name="keywords" content="describingKeywords">

• Meta-Tags, Dublin Core:

  general: <META NAME="DC.element" CONTENT="value">

  <META NAME="DC.TITLE" CONTENT="MyTitle">
  <META NAME="DC.Description" content="The page is ...">
  <META NAME="DC.Date.Created" content="1997">
  <META NAME="DC.Date.LastVerified" content="1998-03-25">
  

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"The low usage of simple HTML metadata suggests that the acceptance and widespread use of more complex standards such as XML ... may be very slow."