SELECT
    DISTINCT ON(
        LOWER(COALESCE(SUBSTRING(value from '<(.*)>'), value)))
    COALESCE(named.count, 1),
    LOWER(COALESCE(named.name,
        LOWER(COALESCE(SUBSTRING(value from '<(.*)>'), value)))) AS id,
    unnamed.name AS name
FROM
    header unnamed
LEFT OUTER JOIN (
    SELECT
        DISTINCT ON (LOWER(COALESCE(SUBSTRING(value from '<(.*)>'), value)))
        COUNT(value) AS count,
        SUBSTRING(value from '(.*)<') AS name,
        LOWER(COALESCE(SUBSTRING(value from '<(.*)>'), value)) AS id
    FROM
        header
    WHERE
        name != ''
    GROUP BY
        LOWER(COALESCE(SUBSTRING(value from '<(.*)>'), value)),
        SUBSTRING(value from '(.*)<')
    ORDER BY
        id,
        count DESC,
        name
) named
ON
    named.id = LOWER(COALESCE(SUBSTRING(unnamed.value from '<(.*)>'), unnamed.value))
;