slide 10

Constraint Languages Express Rules

for example structural or data type rules

• Journal Article =
  journal metadata followed by
  article and issue metadata followed by
  article body followed by
  back matter (which is optional)
• paragraph = data characters and may include any of the following: Brand Drug Name, Generic Drug Name,Street Name, and italic
• Birth is a date which must contain
  4-digit year followed by hyphen followed by
  2-digit month followed by hyphen followed by
  2-digit day