The IfcTextureVertexList defines an ordered collection of texture vertices. Each texture vertex is a two-dimensional vertex provided by a fixed list of two texture coordinates. The attribute TexCoordsList is a two-dimensional list, where: 

• First dimension is an unbounded list representing each texture vertex;
• Second dimension is a fixed list of two list members, where [1] is the S-coordinate, and [2] the T-coordinate of the texture vertex.

The IfcTextureVertexList is introduced to provide a compact representation of an indexable representation of texture coordinates for texture maps in tessellated items.