YAML parsers vs. VuFind search specs

output

============================================================================
HORDE

Array
(
    [AllFields] => Array
        (
            [Variant_1] => Array
                (
                    [series] => Array
                        (
                            [0] => Array
                                (
                                    [0] => onephrase
                                    [1] => 500
                                )

                        )

                )

            [Variant_2] => Array
                (
                    [series] => Array
                        (
                            [0] => Array
                                (
                                    [0] => onephrase
                                    [1] => 500
                                )

                        )

                )

        )

)
============================================================================
SYMFONY

Array
(
    [AllFields] => Array
        (
            [Variant_1] => Array
                (
                    [0] => Array
                        (
                            [series] => Array
                                (
                                    [0] => Array
                                        (
                                            [0] => onephrase
                                            [1] => 500
                                        )
                                )
                        )
                )
            [Variant_2] => Array
                (
                    [series] => Array
                        (
                            [0] => Array
                                (
                                    [0] => onephrase
                                    [1] => 500
                                )
                        )
                )
        )
)

script

<?php

require_once('psr0.autoloader.php');

$horde = Horde_Yaml::loadFile("test.yaml");
$symf  = Symfony\Component\Yaml\Yaml::parse("test.yaml");

echo "============================================================================\n";
echo "HORDE\n\n";
print_r($horde);
echo "============================================================================\n";
echo "SYMFONY\n\n";
print_r($symf);

testfile

---
AllFields:
  Variant_1:
    - series:
      - [onephrase, 500]
  Variant_2:
    series:
      - [onephrase, 500]