1--- %YAML:1.0 2test: Simple In Place Substitution 3brief: > 4 If you want to reuse an entire alias, only overwriting what is different 5 you can use a << in place substitution. This is not part of the official 6 YAML spec, but a widely implemented extension. See the following URL for 7 details: http://yaml.org/type/merge.html 8yaml: | 9 foo: &foo 10 a: Steve 11 b: Clark 12 c: Brian 13 e: notnull 14 bar: 15 a: before 16 d: other 17 e: ~ 18 <<: *foo 19 b: new 20 x: Oren 21 c: 22 foo: bar 23 bar: foo 24 bar_inline: {a: before, d: other, <<: *foo, b: new, x: Oren, c: { foo: bar, bar: foo}} 25 foo2: &foo2 26 a: Ballmer 27 ding: &dong [ fi, fei, fo, fam] 28 check: 29 <<: 30 - *foo 31 - *dong 32 isit: tested 33 head: 34 <<: [ *foo , *dong , *foo2 ] 35 taz: &taz 36 a: Steve 37 w: 38 p: 1234 39 nested: 40 <<: *taz 41 d: Doug 42 w: &nestedref 43 p: 12345 44 z: 45 <<: *nestedref 46 head_inline: &head_inline { <<: [ *foo , *dong , *foo2 ] } 47 recursive_inline: { <<: *head_inline, c: { <<: *foo2 } } 48php: | 49 [ 50 'foo' => ['a' => 'Steve', 'b' => 'Clark', 'c' => 'Brian', 'e' => 'notnull'], 51 'bar' => ['a' => 'before', 'd' => 'other', 'e' => null, 'b' => 'new', 'c' => ['foo' => 'bar', 'bar' => 'foo'], 'x' => 'Oren'], 52 'bar_inline' => ['a' => 'before', 'd' => 'other', 'b' => 'new', 'c' => ['foo' => 'bar', 'bar' => 'foo'], 'e' => 'notnull', 'x' => 'Oren'], 53 'foo2' => ['a' => 'Ballmer'], 54 'ding' => ['fi', 'fei', 'fo', 'fam'], 55 'check' => ['a' => 'Steve', 'b' => 'Clark', 'c' => 'Brian', 'e' => 'notnull', 'fi', 'fei', 'fo', 'fam', 'isit' => 'tested'], 56 'head' => ['a' => 'Steve', 'b' => 'Clark', 'c' => 'Brian', 'e' => 'notnull', 'fi', 'fei', 'fo', 'fam'], 57 'taz' => ['a' => 'Steve', 'w' => ['p' => 1234]], 58 'nested' => ['a' => 'Steve', 'w' => ['p' => 12345], 'd' => 'Doug', 'z' => ['p' => 12345]], 59 'head_inline' => ['a' => 'Steve', 'b' => 'Clark', 'c' => 'Brian', 'e' => 'notnull', 'fi', 'fei', 'fo', 'fam'], 60 'recursive_inline' => ['a' => 'Steve', 'b' => 'Clark', 'c' => ['a' => 'Ballmer'], 'e' => 'notnull', 'fi', 'fei', 'fo', 'fam'], 61 ] 62