--- %YAML:1.0
test: Simple In Place Substitution
brief: >
    If you want to reuse an entire alias, only overwriting what is different
    you can use a << in place substitution. This is not part of the official
    YAML spec, but a widely implemented extension. See the following URL for
    details: http://yaml.org/type/merge.html
yaml: |
    foo: &foo
        a: Steve
        b: Clark
        c: Brian
    bar: &bar
        <<: *foo
        x: Oren
    foo2: &foo2
        a: Ballmer
    ding: &dong [ fi, fei, fo, fam]
    check:
        <<:
            - *foo
            - *dong
        isit: tested
    head:
        <<: [ *foo , *dong , *foo2 ]
php: |
    array('foo' => array('a' => 'Steve', 'b' => 'Clark', 'c' => 'Brian'), 'bar' => array('a' => 'Steve', 'b' => 'Clark', 'c' => 'Brian', 'x' => 'Oren'), 'foo2' => array('a' => 'Ballmer'), 'ding' => array('fi', 'fei', 'fo', 'fam'), 'check' => array('a' => 'Steve', 'b' => 'Clark', 'c' => 'Brian', 'fi', 'fei', 'fo', 'fam', 'isit' => 'tested'), 'head' => array('a' => 'Ballmer', 'b' => 'Clark', 'c' => 'Brian', 'fi', 'fei', 'fo', 'fam'))
