This represents a YAML Document. This node must be a child of Psych::Nodes::Stream. A Psych::Nodes::Document must have one child, and that child may be one of the following:

Methods
N
R
Attributes
[RW] implicit

Was this document implicitly created?
[RW] implicit_end

Is the end of the document implicit?
[RW] tag_directives

A list of tag directives for this document
[RW] version

The version of the YAML document
Class Public methods
new(version = [], tag_directives = [], implicit = false)

Create a new Psych::Nodes::Document object.

version is a list indicating the YAML version. tags_directives is a list of tag directive declarations implicit is a flag indicating whether the document will be implicitly started.

Example:

This creates a YAML document object that represents a YAML 1.1 document with one tag directive, and has an implicit start:

Psych::Nodes::Document.new(
  [1,1],
  [["!", "tag:tenderlovemaking.com,2009:"]],
  true
)

See Also

See also Psych::Handler#start_document

Source: show | on GitHub 

# File ext/psych/lib/psych/nodes/document.rb, line 44
def initialize version = [], tag_directives = [], implicit = false
  super()
  @version        = version
  @tag_directives = tag_directives
  @implicit       = implicit
  @implicit_end   = true
end
Instance Public methods
root()

Returns the root node. A Document may only have one root node: yaml.org/spec/1.1/#id898031

Source: show | on GitHub 

# File ext/psych/lib/psych/nodes/document.rb, line 55
def root
  children.first
end