本标准定义了许多描述性元数据框架，统称为MXF描述性元数据方案-1（DMS-1）。每个描述性元数据（DM）框架由元数据集的逻辑结构定义，这些元数据集允许将它们用作材料交换格式（MXF）文件头元数据的“插件”。这些描述性元数据（DM）框架及其相关元数据集可以应用于任何MXF操作模式规范。此DM方案中的每个DM框架共享相同的底层数据模型。 该标准将每个DM框架定义为一个集合结构，并包括该方案中使用的所有单个元数据集的定义。所有元数据集都以表格形式定义，包括对每个元数据属性的SMPTE元数据字典的引用。该文件还定义了这些DM框架如何与MXF文件正文的视听内容相关，以通过描述性元数据增强MXF文件视听内容的可用性。注:本标准是一份动态文件，允许根据SMPTE 359M中描述的程序添加新组件。 具体来说，随着需求的出现，新的元数据DM框架、集合和单个元数据属性可能会在未来的修订版中添加到本标准中。为了保持向后兼容性，本文件中定义的DM框架、元数据集或元数据属性不得在此类未来版本中删除或以其他方式更改。

This standard defines a number of descriptive metadata frameworks collectively called the MXF descriptive metadata scheme-1 (DMS-1). Each descriptive metadata (DM) framework is defined by a logical structure of metadata sets that allows them to be used as a 'plug-in' to the header metadata of a material exchange format (MXF) file. These descriptive metadata (DM) frameworks and their associated metadata sets may be applied to any MXF operational pattern specification. Every DM framework in this DM scheme shares the same underlying data model. The standard defines each DM framework as a set structure and includes a definition for all individual metadata sets used in this scheme. All metadata sets are defined in tabular form including a reference to the SMPTE metadata dictionary for each metadata property. The document also defines how these DM frameworks relate to the audio-visual content of the body of an MXF file to enhance the usability of the audio-visual content of an MXF file through descriptive metadata. NOTE - This standard is a dynamic document which allows new components to be added according to the procedures described in the SMPTE 359M. Specifically, new metadata DM frameworks, sets and individual metadata properties may be added to this standard in future revisions as requirements emerge. In order to maintain backwards compatibility, no DM framework, metadata set or metadata property defined in this document shall be removed or otherwise changed in such future revisions.