In the following we will explain why we suggest this methodology. For an example of a fully tagged text about skin cancer click here . They describe relevant aspects of the document as a whole.
Some metadata are bibliographic in nature.
Bibliographic metadata have a long tradition in library science. The Dublin core is an attempt to standardise the tags for bibliographic metadata. Some metadata refer to the state of a document in the life cycle. Some metadata describe aspects of the content of the document as a whole. The purpose of adding such metadata to documents is to allow to clearly characterise what distinguishes a specific document from related but different ones.