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=begin
== BDB::XML::Document
A Document is the unit of storage within a Container. A document consists
of content, a name, and a set of metadata attributes.
The document content is a byte stream. It must be well formed XML,
but need not be valid.
included module : Enumerable
=== Methods
--- self[name]
Returns the value of the specified metadata.
--- self[name] = val
Set the value of the specified metadata.
--- content
Return the content of the document
--- content = val
Set the content of the document
--- each {|uri, name, value| ... }
--- each_metadata {|uri, name, value| ... }
Iterate over all metadata
--- get_metadata(uri, name)
--- get_metadata(name)
--- get(uri, name)
--- get(name)
Get the identified metadata from the document.
* ((|uri|))
The namespace within which the name resides.
* ((|name|))
The name of the metadata attribute to be retrieved.
--- manager
Return the manager
--- name
Return the name of the document
--- name = val
Set the name of the document
--- remove_metadata(uri, name)
--- remove_metadata(name)
Remove the identified metadata from the document.
* ((|uri|))
The namespace within which the name resides.
* ((|name|))
The name of the metadata attribute to be removed.
--- set_metadata(name, value)
--- set_metadata(uri, name, value)
--- set(name, value)
--- set(uri, name, value)
Set the identified metadata from the document.
* ((|uri|))
The namespace within which the name resides.
* ((|name|))
The name of the metadata attribute to be set.
* ((|value|))
an XML::Value object
--- to_s
Return the document as a String object
--- to_str
same than ((|to_s|))
--- event_reader
Retrieve content as an XML::EventReader.
=end
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