COLLADA Schema Version 1.4.1 (June 23, 2006) Copyright (C) 2005, 2006 The Khronos Group Inc., Sony Computer Entertainment Inc. All Rights Reserved. Khronos is a trademark of The Khronos Group Inc. COLLADA is a trademark of Sony Computer Entertainment Inc. used by permission by Khronos. Note that this software document is distributed on an "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. enable-xmlns The COLLADA element declares the root of the document that comprises some of the content in the COLLADA schema. The COLLADA element must contain an asset element. The COLLADA element may contain any number of library_animations elements. The COLLADA element may contain any number of library_animation_clips elements. The COLLADA element may contain any number of library_cameras elements. The COLLADA element may contain any number of library_controllerss elements. The COLLADA element may contain any number of library_geometriess elements. The COLLADA element may contain any number of library_effects elements. The COLLADA element may contain any number of library_force_fields elements. The COLLADA element may contain any number of library_images elements. The COLLADA element may contain any number of library_lights elements. The COLLADA element may contain any number of library_materials elements. The COLLADA element may contain any number of library_nodes elements. The COLLADA element may contain any number of library_materials elements. The COLLADA element may contain any number of library_physics_models elements. The COLLADA element may contain any number of library_physics_scenes elements. The COLLADA element may contain any number of library_visual_scenes elements. The scene embodies the entire set of information that can be visualized from the contents of a COLLADA resource. The scene element declares the base of the scene hierarchy or scene graph. The scene contains elements that comprise much of the visual and transformational information content as created by the authoring tools. The instance_physics_scene element declares the instantiation of a COLLADA physics_scene resource. The instance_physics_scene element may appear any number of times. The instance_visual_scene element declares the instantiation of a COLLADA visual_scene resource. The instance_visual_scene element may only appear once. The extra element may appear any number of times. The extra element may appear any number of times. The version attribute is the COLLADA schema revision with which the instance document conforms. Required Attribute. The xml:base attribute allows you to define the base URI for this COLLADA document. See http://www.w3.org/TR/xmlbase/ for more information. An enumuerated type specifying the acceptable morph methods. An enumerated type specifying the acceptable node types. This type is used for URI reference which can only reference a resource declared within it's same document. An enumerated type specifying the acceptable up-axis values. An enumerated type specifying the acceptable document versions. The InputGlobal type is used to represent inputs that can reference external resources. The semantic attribute is the user-defined meaning of the input connection. Required attribute. The source attribute indicates the location of the data source. Required attribute. The InputLocal type is used to represent inputs that can only reference resources declared in the same document. The semantic attribute is the user-defined meaning of the input connection. Required attribute. The source attribute indicates the location of the data source. Required attribute. The InputLocalOffset type is used to represent indexed inputs that can only reference resources declared in the same document. The offset attribute represents the offset into the list of indices. If two input elements share the same offset, they will be indexed the same. This works as a simple form of compression for the list of indices as well as defining the order the inputs should be used in. Required attribute. The semantic attribute is the user-defined meaning of the input connection. Required attribute. The source attribute indicates the location of the data source. Required attribute. The set attribute indicates which inputs should be grouped together as a single set. This is helpful when multiple inputs share the same semantics. The InstanceWithExtra type is used for all generic instance elements. A generic instance element is one which does not have any specific child elements declared. The extra element may occur any number of times. The url attribute refers to resource to instantiate. This may refer to a local resource using a relative URL fragment identifier that begins with the “#” character. The url attribute may refer to an external resource using an absolute or relative URL. The sid attribute is a text string value containing the sub-identifier of this element. This value must be unique within the scope of the parent element. Optional attribute. The name attribute is the text string name of this element. Optional attribute. The TargetableFloat type is used to represent elements which contain a single float value which can be targeted for animation. The sid attribute is a text string value containing the sub-identifier of this element. This value must be unique within the scope of the parent element. Optional attribute. The TargetableFloat3 type is used to represent elements which contain a float3 value which can be targeted for animation. The sid attribute is a text string value containing the sub-identifier of this element. This value must be unique within the scope of the parent element. Optional attribute. The IDREF_array element declares the storage for a homogenous array of ID reference values. The id attribute is a text string containing the unique identifier of this element. This value must be unique within the instance document. Optional attribute. The name attribute is the text string name of this element. Optional attribute. The count attribute indicates the number of values in the array. Required attribute. The Name_array element declares the storage for a homogenous array of Name string values. The id attribute is a text string containing the unique identifier of this element. This value must be unique within the instance document. Optional attribute. The name attribute is the text string name of this element. Optional attribute. The count attribute indicates the number of values in the array. Required attribute. The bool_array element declares the storage for a homogenous array of boolean values. The id attribute is a text string containing the unique identifier of this element. This value must be unique within the instance document. Optional attribute. The name attribute is the text string name of this element. Optional attribute. The count attribute indicates the number of values in the array. Required attribute. The float_array element declares the storage for a homogenous array of floating point values. The id attribute is a text string containing the unique identifier of this element. This value must be unique within the instance document. Optional attribute. The name attribute is the text string name of this element. Optional attribute. The count attribute indicates the number of values in the array. Required attribute. The digits attribute indicates the number of significant decimal digits of the float values that can be contained in the array. The default value is 6. Optional attribute. The magnitude attribute indicates the largest exponent of the float values that can be contained in the array. The default value is 38. Optional attribute. The int_array element declares the storage for a homogenous array of integer values. The id attribute is a text string containing the unique identifier of this element. This value must be unique within the instance document. Optional attribute. The name attribute is the text string name of this element. Optional attribute. The count attribute indicates the number of values in the array. Required attribute. The minInclusive attribute indicates the smallest integer value that can be contained in the array. The default value is –2147483648. Optional attribute. The maxInclusive attribute indicates the largest integer value that can be contained in the array. The default value is 2147483647. Optional attribute. The accessor element declares an access pattern to one of the array elements: float_array, int_array, Name_array, bool_array, and IDREF_array. The accessor element describes access to arrays that are organized in either an interleaved or non-interleaved manner, depending on the offset and stride attributes. The accessor element may have any number of param elements. The count attribute indicates the number of times the array is accessed. Required attribute. The offset attribute indicates the index of the first value to be read from the array. The default value is 0. Optional attribute. The source attribute indicates the location of the array to access using a URL expression. Required attribute. The stride attribute indicates number of values to be considered a unit during each access to the array. The default value is 1, indicating that a single value is accessed. Optional attribute. The param element declares parametric information regarding its parent element. The name attribute is the text string name of this element. Optional attribute. The sid attribute is a text string value containing the sub-identifier of this element. This value must be unique within the scope of the parent element. Optional attribute. The semantic attribute is the user-defined meaning of the parameter. Optional attribute. The type attribute indicates the type of the value data. This text string must be understood by the application. Required attribute. The source element declares a data repository that provides values according to the semantics of an input element that refers to it. The source element may contain an asset element. The source element may contain an IDREF_array. The source element may contain a Name_array. The source element may contain a bool_array. The source element may contain a float_array. The source element may contain an int_array. The technique common specifies the common method for accessing this source element's data. The source's technique_common must have one and only one accessor. This element may contain any number of non-common profile techniques. The id attribute is a text string containing the unique identifier of this element. This value must be unique within the instance document. Required attribute. The name attribute is the text string name of this element. Optional attribute. Geometry describes the visual shape and appearance of an object in the scene. The geometry element categorizes the declaration of geometric information. Geometry is a branch of mathematics that deals with the measurement, properties, and relationships of points, lines, angles, surfaces, and solids. The geometry element may contain an asset element. The geometry element may contain only one mesh or convex_mesh. The geometry element may contain only one mesh or convex_mesh. The extra element may appear any number of times. The id attribute is a text string containing the unique identifier of this element. This value must be unique within the instance document. Optional attribute. The name attribute is the text string name of this element. Optional attribute. The mesh element contains vertex and primitive information sufficient to describe basic geometric meshes. The mesh element must contain one or more source elements. The mesh element must contain one vertices element. The mesh element may contain any number of lines elements. The mesh element may contain any number of linestrips elements. The mesh element may contain any number of polygons elements. The mesh element may contain any number of polylist elements. The mesh element may contain any number of triangles elements. The mesh element may contain any number of trifans elements. The mesh element may contain any number of tristrips elements. The extra element may appear any number of times. The spline element contains control vertex information sufficient to describe basic splines. The mesh element must contain one or more source elements. The control vertices element must occur exactly one time. It is used to describe the CVs of the spline. The input element must occur at least one time. These inputs are local inputs. The extra element may appear any number of times. The extra element may appear any number of times. The p element represents primitive data for the primitive types (lines, linestrips, polygons, polylist, triangles, trifans, tristrips). The p element contains indices that reference into the parent's source elements referenced by the input elements. The lines element provides the information needed to bind vertex attributes together and then organize those vertices into individual lines. Each line described by the mesh has two vertices. The first line is formed from first and second vertices. The second line is formed from the third and fourth vertices and so on. The input element may occur any number of times. This input is a local input with the offset and set attributes. The p element may occur once. The extra element may appear any number of times. The name attribute is the text string name of this element. Optional attribute. The count attribute indicates the number of line primitives. Required attribute. The material attribute declares a symbol for a material. This symbol is bound to a material at the time of instantiation. If the material attribute is not specified then the lighting and shading results are application defined. Optional attribute. The linestrips element provides the information needed to bind vertex attributes together and then organize those vertices into connected line-strips. Each line-strip described by the mesh has an arbitrary number of vertices. Each line segment within the line-strip is formed from the current vertex and the preceding vertex. The input element may occur any number of times. This input is a local input with the offset and set attributes. The linestrips element may have any number of p elements. The extra element may appear any number of times. The name attribute is the text string name of this element. Optional attribute. The count attribute indicates the number of linestrip primitives. Required attribute. The material attribute declares a symbol for a material. This symbol is bound to a material at the time of instantiation. If the material attribute is not specified then the lighting and shading results are application defined. Optional attribute. The polygons element provides the information needed to bind vertex attributes together and then organize those vertices into individual polygons. The polygons described can contain arbitrary numbers of vertices. These polygons may be self intersecting and may also contain holes. The input element may occur any number of times. This input is a local input with the offset and set attributes. The p element may occur any number of times. The ph element descripes a polygon with holes. Theere may only be one p element. The h element represents a hole in the polygon specified. There must be at least one h element. The extra element may appear any number of times. The name attribute is the text string name of this element. Optional attribute. The count attribute indicates the number of polygon primitives. Required attribute. The material attribute declares a symbol for a material. This symbol is bound to a material at the time of instantiation. If the material attribute is not specified then the lighting and shading results are application defined. Optional attribute. The polylist element provides the information needed to bind vertex attributes together and then organize those vertices into individual polygons. The polygons described in polylist can contain arbitrary numbers of vertices. Unlike the polygons element, the polylist element cannot contain polygons with holes. The input element may occur any number of times. This input is a local input with the offset and set attributes. The vcount element contains a list of integers describing the number of sides for each polygon described by the polylist element. The vcount element may occur once. The p element may occur once. The extra element may appear any number of times. The name attribute is the text string name of this element. Optional attribute. The count attribute indicates the number of polygon primitives. Required attribute. The material attribute declares a symbol for a material. This symbol is bound to a material at the time of instantiation. If the material attribute is not specified then the lighting and shading results are application defined. Optional attribute. The triangles element provides the information needed to bind vertex attributes together and then organize those vertices into individual triangles. Each triangle described by the mesh has three vertices. The first triangle is formed from the first, second, and third vertices. The second triangle is formed from the fourth, fifth, and sixth vertices, and so on. The input element may occur any number of times. This input is a local input with the offset and set attributes. The triangles element may have any number of p elements. The extra element may appear any number of times. The name attribute is the text string name of this element. Optional attribute. The count attribute indicates the number of triangle primitives. Required attribute. The material attribute declares a symbol for a material. This symbol is bound to a material at the time of instantiation. Optional attribute. If the material attribute is not specified then the lighting and shading results are application defined. The trifans element provides the information needed to bind vertex attributes together and then organize those vertices into connected triangles. Each triangle described by the mesh has three vertices. The first triangle is formed from first, second, and third vertices. Each subsequent triangle is formed from the current vertex, reusing the first and the previous vertices. The input element may occur any number of times. This input is a local input with the offset and set attributes. The trifans element may have any number of p elements. The extra element may appear any number of times. The name attribute is the text string name of this element. Optional attribute. The count attribute indicates the number of triangle fan primitives. Required attribute. The material attribute declares a symbol for a material. This symbol is bound to a material at the time of instantiation. If the material attribute is not specified then the lighting and shading results are application defined. Optional attribute. The tristrips element provides the information needed to bind vertex attributes together and then organize those vertices into connected triangles. Each triangle described by the mesh has three vertices. The first triangle is formed from first, second, and third vertices. Each subsequent triangle is formed from the current vertex, reusing the previous two vertices. The input element may occur any number of times. This input is a local input with the offset and set attributes. The tristrips element may have any number of p elements. The extra element may appear any number of times. The name attribute is the text string name of this element. Optional attribute. The count attribute indicates the number of triangle strip primitives. Required attribute. The material attribute declares a symbol for a material. This symbol is bound to a material at the time of instantiation. If the material attribute is not specified then the lighting and shading results are application defined. Optional attribute. The vertices element declares the attributes and identity of mesh-vertices. The vertices element describes mesh-vertices in a mesh geometry. The mesh-vertices represent the position (identity) of the vertices comprising the mesh and other vertex attributes that are invariant to tessellation. The input element must occur at least one time. These inputs are local inputs. The extra element may appear any number of times. The id attribute is a text string containing the unique identifier of this element. This value must be unique within the instance document. Required attribute. The name attribute is the text string name of this element. Optional attribute. The lookat element contains a position and orientation transformation suitable for aiming a camera. The lookat element contains three mathematical vectors within it that describe: 1. The position of the object; 2. The position of the interest point; 3. The direction that points up. The sid attribute is a text string value containing the sub-identifier of this element. This value must be unique within the scope of the parent element. Optional attribute. Matrix transformations embody mathematical changes to points within a coordinate systems or the coordinate system itself. The matrix element contains a 4-by-4 matrix of floating-point values. The sid attribute is a text string value containing the sub-identifier of this element. This value must be unique within the scope of the parent element. Optional attribute. The rotate element contains an angle and a mathematical vector that represents the axis of rotation. The sid attribute is a text string value containing the sub-identifier of this element. This value must be unique within the scope of the parent element. Optional attribute. The scale element contains a mathematical vector that represents the relative proportions of the X, Y and Z axes of a coordinated system. The skew element contains an angle and two mathematical vectors that represent the axis of rotation and the axis of translation. The sid attribute is a text string value containing the sub-identifier of this element. This value must be unique within the scope of the parent element. Optional attribute. The translate element contains a mathematical vector that represents the distance along the X, Y and Z-axes. The image element declares the storage for the graphical representation of an object. The image element best describes raster image data, but can conceivably handle other forms of imagery. The image elements allows for specifying an external image file with the init_from element or embed image data with the data element. The image element may contain an asset element. The data child element contains a sequence of hexadecimal encoded binary octets representing the embedded image data. The init_from element allows you to specify an external image file to use for the image element. The extra element may appear any number of times. The id attribute is a text string containing the unique identifier of this element. This value must be unique within the instance document. Optional attribute. The name attribute is the text string name of this element. Optional attribute. The format attribute is a text string value that indicates the image format. Optional attribute. The height attribute is an integer value that indicates the height of the image in pixel units. Optional attribute. The width attribute is an integer value that indicates the width of the image in pixel units. Optional attribute. The depth attribute is an integer value that indicates the depth of the image in pixel units. A 2-D image has a depth of 1, which is also the default value. Optional attribute. The light element declares a light source that illuminates the scene. Light sources have many different properties and radiate light in many different patterns and frequencies. The light element may contain an asset element. The technique_common element specifies the light information for the common profile which all COLLADA implementations need to support. The ambient element declares the parameters required to describe an ambient light source. An ambient light is one that lights everything evenly, regardless of location or orientation. The color element contains three floating point numbers specifying the color of the light. The color element must occur exactly once. The directional element declares the parameters required to describe a directional light source. A directional light is one that lights everything from the same direction, regardless of location. The light’s default direction vector in local coordinates is [0,0,-1], pointing down the -Z axis. The actual direction of the light is defined by the transform of the node where the light is instantiated. The color element contains three floating point numbers specifying the color of the light. The color element must occur exactly once. The point element declares the parameters required to describe a point light source. A point light source radiates light in all directions from a known location in space. The intensity of a point light source is attenuated as the distance to the light source increases. The position of the light is defined by the transform of the node in which it is instantiated. The color element contains three floating point numbers specifying the color of the light. The color element must occur exactly once. The constant_attenuation is used to calculate the total attenuation of this light given a distance. The equation used is A = constant_attenuation + Dist*linear_attenuation + Dist^2*quadratic_attenuation. The linear_attenuation is used to calculate the total attenuation of this light given a distance. The equation used is A = constant_attenuation + Dist*linear_attenuation + Dist^2*quadratic_attenuation. The quadratic_attenuation is used to calculate the total attenuation of this light given a distance. The equation used is A = constant_attenuation + Dist*linear_attenuation + Dist^2*quadratic_attenuation. The spot element declares the parameters required to describe a spot light source. A spot light source radiates light in one direction from a known location in space. The light radiates from the spot light source in a cone shape. The intensity of the light is attenuated as the radiation angle increases away from the direction of the light source. The intensity of a spot light source is also attenuated as the distance to the light source increases. The position of the light is defined by the transform of the node in which it is instantiated. The light’s default direction vector in local coordinates is [0,0,-1], pointing down the -Z axis. The actual direction of the light is defined by the transform of the node where the light is instantiated. The color element contains three floating point numbers specifying the color of the light. The color element must occur exactly once. The constant_attenuation is used to calculate the total attenuation of this light given a distance. The equation used is A = constant_attenuation + Dist*linear_attenuation + Dist^2*quadratic_attenuation. The linear_attenuation is used to calculate the total attenuation of this light given a distance. The equation used is A = constant_attenuation + Dist*linear_attenuation + Dist^2*quadratic_attenuation. The quadratic_attenuation is used to calculate the total attenuation of this light given a distance. The equation used is A = constant_attenuation + Dist*linear_attenuation + Dist^2*quadratic_attenuation. The falloff_angle is used to specify the amount of attenuation based on the direction of the light. The falloff_exponent is used to specify the amount of attenuation based on the direction of the light. This element may contain any number of non-common profile techniques. The extra element may appear any number of times. The id attribute is a text string containing the unique identifier of this element. This value must be unique within the instance document. Optional attribute. The name attribute is the text string name of this element. Optional attribute. Materials describe the visual appearance of a geometric object. The material element may contain an asset element. The material must instance an effect. The extra element may appear any number of times. The id attribute is a text string containing the unique identifier of this element. This value must be unique within the instance document. Optional attribute. The name attribute is the text string name of this element. Optional attribute. The camera element declares a view into the scene hierarchy or scene graph. The camera contains elements that describe the camera’s optics and imager. The camera element may contain an asset element. Optics represents the apparatus on a camera that projects the image onto the image sensor. The technique_common element specifies the optics information for the common profile which all COLLADA implementations need to support. The orthographic element describes the field of view of an orthographic camera. The xmag element contains a floating point number describing the horizontal magnification of the view. The ymag element contains a floating point number describing the vertical magnification of the view. It can also have a sid. The aspect_ratio element contains a floating point number describing the aspect ratio of the field of view. If the aspect_ratio element is not present the aspect ratio is to be calculated from the xmag or ymag elements and the current viewport. The znear element contains a floating point number that describes the distance to the near clipping plane. The znear element must occur exactly once. The zfar element contains a floating point number that describes the distance to the far clipping plane. The zfar element must occur exactly once. The perspective element describes the optics of a perspective camera. The xfov element contains a floating point number describing the horizontal field of view in degrees. The yfov element contains a floating point number describing the verticle field of view in degrees. The aspect_ratio element contains a floating point number describing the aspect ratio of the field of view. If the aspect_ratio element is not present the aspect ratio is to be calculated from the xfov or yfov elements and the current viewport. The znear element contains a floating point number that describes the distance to the near clipping plane. The znear element must occur exactly once. The zfar element contains a floating point number that describes the distance to the far clipping plane. The zfar element must occur exactly once. This element may contain any number of non-common profile techniques. The extra element may appear any number of times. Imagers represent the image sensor of a camera (for example film or CCD). This element may contain any number of non-common profile techniques. There is no common technique for imager. The extra element may appear any number of times. The extra element may appear any number of times. The id attribute is a text string containing the unique identifier of this element. This value must be unique within the instance document. Optional attribute. The name attribute is the text string name of this element. Optional attribute. The animation element categorizes the declaration of animation information. The animation hierarchy contains elements that describe the animation’s key-frame data and sampler functions, ordered in such a way to group together animations that should be executed together. The animation element may contain an asset element. The animation element may contain any number of source elements. The animation element may contain any number of sampler elements. The animation element may contain any number of channel elements. The animation may be hierarchical and may contain any number of other animation elements. The extra element may appear any number of times. The id attribute is a text string containing the unique identifier of this element. This value must be unique within the instance document. Optional attribute. The name attribute is the text string name of this element. Optional attribute. The animation_clip element defines a section of the animation curves to be used together as an animation clip. The animation_clip element may contain an asset element. The animation_clip must instance at least one animation element. The extra element may appear any number of times. The id attribute is a text string containing the unique identifier of this element. This value must be unique within the instance document. Optional attribute. The name attribute is the text string name of this element. Optional attribute. The start attribute is the time in seconds of the beginning of the clip. This time is the same as that used in the key-frame data and is used to determine which set of key-frames will be included in the clip. The start time does not specify when the clip will be played. If the time falls between two keyframes of a referenced animation, an interpolated value should be used. The default value is 0.0. Optional attribute. The end attribute is the time in seconds of the end of the clip. This is used in the same way as the start time. If end is not specified, the value is taken to be the end time of the longest animation. Optional attribute. The channel element declares an output channel of an animation. The source attribute indicates the location of the sampler using a URL expression. The sampler must be declared within the same document. Required attribute. The target attribute indicates the location of the element bound to the output of the sampler. This text string is a path-name following a simple syntax described in Address Syntax. Required attribute. The sampler element declares an N-dimensional function used for animation. Animation function curves are represented by 1-D sampler elements in COLLADA. The sampler defines sampling points and how to interpolate between them. The input element must occur at least one time. These inputs are local inputs. The id attribute is a text string containing the unique identifier of this element. This value must be unique within the instance document. Optional attribute. The controller element categorizes the declaration of generic control information. A controller is a device or mechanism that manages and directs the operations of another object. The controller element may contain an asset element. The controller element may contain either a skin element or a morph element. The controller element may contain either a skin element or a morph element. The extra element may appear any number of times. The id attribute is a text string containing the unique identifier of this element. This value must be unique within the instance document. Optional attribute. The name attribute is the text string name of this element. Optional attribute. The skin element contains vertex and primitive information sufficient to describe blend-weight skinning. This provides extra information about the position and orientation of the base mesh before binding. If bind_shape_matrix is not specified then an identity matrix may be used as the bind_shape_matrix. The bind_shape_matrix element may occur zero or one times. The skin element must contain at least three source elements. The joints element associates joint, or skeleton, nodes with attribute data. In COLLADA, this is specified by the inverse bind matrix of each joint (influence) in the skeleton. The input element must occur at least twice. These inputs are local inputs. The extra element may appear any number of times. The vertex_weights element associates a set of joint-weight pairs with each vertex in the base mesh. The input element must occur at least twice. The vcount element contains a list of integers describing the number of influences for each vertex. The vcount element may occur once. The v element describes which bones and attributes are associated with each vertex. An index of –1 into the array of joints refers to the bind shape. Weights should be normalized before use. The v element must occur zero or one times. The extra element may appear any number of times. The count attribute describes the number of vertices in the base mesh. Required element. The extra element may appear any number of times. The source attribute contains a URI reference to the base mesh, (a static mesh or a morphed mesh). This also provides the bind-shape of the skinned mesh. Required attribute. The morph element describes the data required to blend between sets of static meshes. Each possible mesh that can be blended (a morph target) must be specified. The morph element must contain at least two source elements. The targets element declares the morph targets, their weights and any user defined attributes associated with them. The input element must occur at least twice. These inputs are local inputs. The extra element may appear any number of times. The extra element may appear any number of times. The method attribute specifies the which blending technique to use. The accepted values are NORMALIZED, and RELATIVE. The default value if not specified is NORMALIZED. Optional attribute. The source attribute indicates the base mesh. Required attribute. The asset element defines asset management information regarding its parent element. The contributor element defines authoring information for asset management The author element contains a string with the author's name. There may be only one author element. The authoring_tool element contains a string with the authoring tool's name. There may be only one authoring_tool element. The comments element contains a string with comments from this contributor. There may be only one comments element. The copyright element contains a string with copyright information. There may be only one copyright element. The source_data element contains a URI reference to the source data used for this asset. There may be only one source_data element. The created element contains the date and time that the parent element was created and is represented in an ISO 8601 format. The created element may appear zero or one time. The keywords element contains a list of words used as search criteria for the parent element. The keywords element may appear zero or more times. The modified element contains the date and time that the parent element was last modified and represented in an ISO 8601 format. The modified element may appear zero or one time. The revision element contains the revision information for the parent element. The revision element may appear zero or one time. The subject element contains a description of the topical subject of the parent element. The subject element may appear zero or one time. The title element contains the title information for the parent element. The title element may appear zero or one time. The unit element contains descriptive information about unit of measure. It has attributes for the name of the unit and the measurement with respect to the meter. The unit element may appear zero or one time. The meter attribute specifies the measurement with respect to the meter. The default value for the meter attribute is “1.0”. The name attribute specifies the name of the unit. The default value for the name attribute is “meter”. The up_axis element contains descriptive information about coordinate system of the geometric data. All coordinates are right-handed by definition. This element specifies which axis is considered up. The default is the Y-axis. The up_axis element may appear zero or one time. The extra element declares additional information regarding its parent element. The extra element may contain an asset element. This element must contain at least one non-common profile technique. The id attribute is a text string containing the unique identifier of this element. This value must be unique within the instance document. Optional attribute. The name attribute is the text string name of this element. Optional attribute. The type attribute indicates the type of the value data. This text string must be understood by the application. Optional attribute. enable-xmlns The technique element declares the information used to process some portion of the content. Each technique conforms to an associated profile. Techniques generally act as a “switch”. If more than one is present for a particular portion of content, on import, one or the other is picked, but usually not both. Selection should be based on which profile the importing application can support. Techniques contain application data and programs, making them assets that can be managed as a unit. The profile attribute indicates the type of profile. This is a vendor defined character string that indicates the platform or capability target for the technique. Required attribute. Nodes embody the hierarchical relationship of elements in the scene. The node element may contain an asset element. The node element may contain any number of lookat elements. The node element may contain any number of matrix elements. The node element may contain any number of rotate elements. The node element may contain any number of scale elements. The node element may contain any number of skew elements. The node element may contain any number of translate elements. The node element may instance any number of camera objects. The node element may instance any number of controller objects. The node element may instance any number of geometry objects. The node element may instance any number of light objects. The node element may instance any number of node elements or hierarchies objects. The node element may be hierarchical and be the parent of any number of other node elements. The extra element may appear any number of times. The id attribute is a text string containing the unique identifier of this element. This value must be unique within the instance document. Optional attribute. The name attribute is the text string name of this element. Optional attribute. The sid attribute is a text string value containing the sub-identifier of this element. This value must be unique within the scope of the parent element. Optional attribute. The type attribute indicates the type of the node element. The default value is “NODE”. Optional attribute. The layer attribute indicates the names of the layers to which this node belongs. For example, a value of “foreground glowing” indicates that this node belongs to both the ‘foreground’ layer and the ‘glowing’ layer. The default value is empty, indicating that the node doesn’t belong to any layer. Optional attribute. The visual_scene element declares the base of the visual_scene hierarchy or scene graph. The scene contains elements that comprise much of the visual and transformational information content as created by the authoring tools. The visual_scene element may contain an asset element. The visual_scene element must have at least one node element. The evaluate_scene element declares information specifying a specific way to evaluate this visual_scene. There may be any number of evaluate_scene elements. The render element describes one effect pass to evaluate the scene. There must be at least one render element. The layer element specifies which layer to render in this compositing step while evaluating the scene. You may specify any number of layers. The instance_effect element specifies which effect to render in this compositing step while evaluating the scene. The camera_node attribute refers to a node that contains a camera describing the viewpoint to render this compositing step from. The name attribute is the text string name of this element. Optional attribute. The extra element may appear any number of times. The id attribute is a text string containing the unique identifier of this element. This value must be unique within the instance document. Optional attribute. The name attribute is the text string name of this element. Optional attribute. Bind a specific material to a piece of geometry, binding varying and uniform parameters at the same time. The bind_material element may contain any number of param elements. The technique_common element specifies the bind_material information for the common profile which all COLLADA implementations need to support. The instance_material element specifies the information needed to bind a geometry to a material. This element must appear at least once. This element may contain any number of non-common profile techniques. The extra element may appear any number of times. The instance_camera element declares the instantiation of a COLLADA camera resource. The instance_controller element declares the instantiation of a COLLADA controller resource. The skeleton element is used to indicate where a skin controller is to start to search for the joint nodes it needs. This element is meaningless for morph controllers. Bind a specific material to a piece of geometry, binding varying and uniform parameters at the same time. The extra element may appear any number of times. The url attribute refers to resource. This may refer to a local resource using a relative URL fragment identifier that begins with the “#” character. The url attribute may refer to an external resource using an absolute or relative URL. The sid attribute is a text string value containing the sub-identifier of this element. This value must be unique within the scope of the parent element. Optional attribute. The name attribute is the text string name of this element. Optional attribute. The instance_effect element declares the instantiation of a COLLADA effect resource. Add a hint for a platform of which technique to use in this effect. A platform defines a string that specifies which platform this is hint is aimed for. A profile defines a string that specifies which API profile this is hint is aimed for. A reference to the technique to use for the specified platform. Assigns a new value to a previously defined parameter The extra element may appear any number of times. The url attribute refers to resource. This may refer to a local resource using a relative URL fragment identifier that begins with the “#” character. The url attribute may refer to an external resource using an absolute or relative URL. The sid attribute is a text string value containing the sub-identifier of this element. This value must be unique within the scope of the parent element. Optional attribute. The name attribute is the text string name of this element. Optional attribute. The instance_force_field element declares the instantiation of a COLLADA force_field resource. The instance_geometry element declares the instantiation of a COLLADA geometry resource. Bind a specific material to a piece of geometry, binding varying and uniform parameters at the same time.