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grammar or in the instances. the elements are deined in alphabetical order,
just to simplify the access to the elements for a human user.
the various models are always completed by annotations or comments
which explain the semantic role of a given element. these explanations are
based on the deinitions in the metadata glossary.
Although it is possible to use the various elements at any place within an
instance, it is recommended to integrate them within a single block. this
should simplify searches in the documents. furthermore a control of cardinality
is only possible within the predeined block. Another possibility is the creation
of an element in the local schema which is related to the efog-type. from
a technical point of view this approach is as eficient as the use of the efogblock
element; the only disadvantage is that for researching the instances the
name of the block should be known.
the grammars will be available from the formex website, which is managed
by the Publications Ofice (http://formex.publications.europa.eu/schema/).
the URL is completed by the name of the grammar and is also valid for
the DtD. the directory will always contain all versions of the grammars. So in
the case of improvements there is not necessarily the need to review and update
all instances. the syntax of the names of the grammars has been deined
as follows:
• [ 1] name :: = name.schema | name.DtD
• [ 2] name.schema :: = ‘efog_’ ‘cnt_’? date ‘.xsd’
• [ 3] name.DtD :: = ‘efog_’ date ‘.dtd’
• [ 4] date :: = d{8}
• [ 5] d :: = ‘0’|‘1’|‘2’|‘3’|‘4’|‘5’|‘6’|‘7|‘8’|‘9’.
the date relects the date when the version of the grammar was adopted.
the constant part ‘cnt_’ is only to be used when the schema is referred to by
means of the namespace technology. (the schema is to be found in Annex 2B.)
As discussed earlier in this document, the implementation can be achieved
in different ways: a copy-paste method, the inclusion of the schema, or a
namespace reference. for the DtD, the copy-paste method and the inclusion
are feasible. the copy-paste method is highly deprecated; details on inclusion
and namespace references can be found in Annex 2D.
6. BENEfItS Of COmmON mEtADAtA
In this chapter the working group will exemplify the beneits of common
metadata by different cases of use that hopefully will promote the dissemina-
01_2007_5222_txt_ML.indd 94 6-12-2007 15:13:49