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# Anatomy of a CTF File

The transform format allows the author to define an arbitrary chain of color operators (also called processing nodes). The set of available operator types includes 1D LUTs, 3D LUTs, matrices, and others defined below. The format is written in XML and is therefore human readable.

Here is an example:

    <?xml version="1.0" encoding="UTF-8"?>
    <ProcessList id="7401489a-9e4d-441d-a8b7-795739801f4e" name="ACES to HD" version="1.2">
        <Info>
            <Copyright>Copyright 2012 Autodesk, Inc.  All rights reserved.</Copyright>
            <Release>2013.1.pr20</Release>
        </Info>
        <Description>ACES Reference Rendering Transform + HD video Output Device Transform</Description>
        <Description>aces_dev version 0.1.1</Description>
        <InputDescriptor>Academy Color Encoding Specification (ACES)</InputDescriptor>
        <OutputDescriptor>HD (Rec 709) video</OutputDescriptor>
        <LUT1D halfDomain="true" inBitDepth="32f" outBitDepth="32f" rawHalfs="true">
            <Array dim="65536 1">
        0
        1
        1

        <!-- 65533 lines omitted -->

            </Array>
        </LUT1D>
        <Matrix inBitDepth="32f" outBitDepth="32f">
            <Array dim="3 3 3">
     0.9259999990  0.0379999988  0.0359999985
     0.1299999952  0.8000000119  0.0700000003
    -0.0350000001 -0.0350000001  1.0700000525
            </Array>
        </Matrix>
        <LUT1D halfDomain="true" inBitDepth="32f" outBitDepth="32f" rawHalfs="true">
            <Array dim="65536 1">
        0
        0
        0

        <!-- 65533 lines omitted -->

           </Array>
        </LUT1D>
        <LUT3D inBitDepth="32f" interpolation="tetrahedral" outBitDepth="32f">
            <Array dim="48 48 48 3">
     0.000669299  0.000704187  0.000766901
     0.001848371  0.001297010  0.010368987
     0.002599007  0.001144927  0.023227118

            </Array>
        </LUT3D>
        <Gamma inBitDepth="32f" outBitDepth="32f" style="moncurveFwd">
            <GammaParams gamma="2.600000000000000" offset="0.050000" />
        </Gamma>
        <Matrix inBitDepth="32f" outBitDepth="32f">
            <Array dim="3 3 3">
     3.2409698963 -1.5373831987 -0.4986107647
    -0.9692436457  1.8759675026  0.0415550582
     0.0556300804 -0.2039769590  1.0569715500
            </Array>
        </Matrix>
        <Range inBitDepth="32f" outBitDepth="32f">
            <minInValue>  0.0000</minInValue>
            <maxInValue>  1.0000</maxInValue>
            <minOutValue>  0.0000</minOutValue>
            <maxOutValue>  1.0000</maxOutValue>
        </Range>
        <Gamma inBitDepth="32f" outBitDepth="12i" style="basicRev">
            <GammaParams gamma="2.400000000000000" />
        </Gamma>
    </ProcessList>