Both "A Parcel..." and Ruth are correct, but they seem to disagree on what you meant by "holy."
They also left out all the Rabbinical writings that revolve around the Talmud, such as Rashi, Tosafot, and all the other Rishonim and Acharonim (lit. Early Ones - b4 the Shulchan Arukh=appx 1550; and Later Ones - from 1550-present).
In addition, Jews consider any work that discusses Torah (in the general sense, not just the Bible) as part of the Oral Torah. So any work on Halakha, such as Maimonides and the Shulchan Arukh, and all the works that revolve around them, are also considered "holy."
The Talmud is not exactly a "commentary" on the Torah. It's the main text of the Oral Torah, whereas the Bible (what you called the "Torah") is the Written Torah. The general term "Torah" refers to both. Orthodox Jewry considers both to be divine - the Written Torah is that actual word of God to the prophets, and the Oral Torah originated at Sinai as well. (There's a large debate that's been raging for centuries as to exactly how much of the Oral Torah is directly from God and how much is human invention; too much to go into here.)
The Talmud does do Biblical Commentary in many places, and most of the Laws discussed within it are based on Biblical verses, but the main goal of the Talmud is not Biblical Exegesis - it's to ascertain the Halakha, the Law.
This is a very large topic, and I highly recommend that you ask you Local (hopefully scholarly) Orthodox** Rabbi for more.
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**Reform Jsm assigns much less importance to the Talmud.
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To summarize:
The Rabbinical Writings is anything written by a Jewish scholar discussing the Torah. Torah is very broad, and includes the Bible, the Mishna and Talmud, Ethics, Jewish Philosophy*(*actually, some may disagree here), and more.
Orthodox Jewry views the Oral and Written Torahs as equal. Both are divine (debate as to how much). Both are sacred. Both are "holy."
The Rabbinical Writings include, but is certainly not limited to, the Talmud.
The Talmud is much more than a commentary on the Written Torah. It contains discussions about the Halakha, it contains Commentary on Biblical Verses, it contains Moral and Ethical lessons, and it even contains stories about the Rabbis.