In Matthew 1:1, what is the function of Βίβλος?
Westcott and Hort / [NA27 variants] ΒΙΒΛΟΣ γενέσεως Ἰησοῦ Χριστοῦ υἱοῦ Δαυεὶδ / Δαυὶδ υἱοῦ Ἀβραάμ.
The NIV omits it:
New International Version This is the genealogy of Jesus the Messiah the son of David, the son of Abraham:
The ESV has "book of":
English Standard Version The book of the genealogy of Jesus Christ, the son of David, the son of Abraham.
The NASB and other have "record of":
New American Standard Bible The record of the genealogy of Jesus the Messiah, the son of David, the son of Abraham:
And Young's has "roll":
Young's Literal Translation A roll of the birth of Jesus Christ, son of David, son of Abraham.
Is it possible that "Matthew" was suggesting that his genealogy of Jesus was to serve as the official genealogy? Or was it a copy of an original? If a copy, where would the original be found?
And is the reference of Βίβλος as far as verse 16? Verse 17? Verse 25? Or other?