ISO 10303-55:2005规定了用于表示程序或构造历史类型的模型的资源构造，根据用于构造它们的构造操作的顺序来定义。这里没有指定操作本身的表示；本文档中提供的机制允许为此目的使用ISO 10303其他部分中定义的实体数据类型。以下内容属于ISO 10303-55:2005的范围: 用于生成任何类型的显式表示或模型的构造操作序列的规范； 构造序列的层次结构； 在构造序列中嵌入显式定义的元素以表示混合模型； 使用ISO 10303其他部分的representation_item定义来表示这些representation_item实例的构造操作；通过将程序模型与显式“当前结果”模型关联来定义对偶表示，后者充当由前者定义的参数模型族的代表性示例； 设计原理信息与程序模型的关联； 在程序模型中识别通过交互式拾取从发送系统中的模型的视觉显示中选择的显式元素； 在程序模型中识别出于模型简化的目的可以被抑制的构造操作； 用于形状模型的过程表示的前述能力的专门化。

ISO 10303-55:2005 specifies resource constructs for the representation of models of the procedural or construction history type, defined in terms of the sequence of constructional operations used to build them. Representations of the operations themselves are not specified here; the mechanisms provided in this document allow the use of entity data types defined in other parts of ISO 10303 for that purpose.The following are within the scope of ISO 10303-55:2005: the specification of sequences of constructional operations for the generation of any kind of explicit representation or model; the hierarchical structuring of constructional sequences; the embedding of explicitly defined elements in constructional sequences for the representation of hybrid models; the use of representation_item definitions from other parts of ISO 10303 to represent constructional operations for instances of those representation_items; the definition of a dual representation by association of a procedural model with an explicit "current result" model, the latter acting as a representative example of the parametric family of models defined by the former; the association of design rationale information with a procedural model; the identification, in a procedural model, of explicit elements selected by interactive picking from the visual display of the model in the sending system; the identification, in a procedural model, of constructional operations that can be suppressed for purposes of model simplification; specialization of the foregoing capabilities for the procedural representation of shape models.