本标准定义了SMPTE 377M第7节中定义的操作模式1c、2c和3c 交换代表以下文件复杂度级别的MXF文件:--OP1c:选择2个或多个替代材料包，播放单个 文件包或两个或多个同步文件包，-OP2c:两个或多个备选材料包的选择，播放一个或多个文件包的选定曲目 单个文件包的序列，或两个或多个同步文件包的序列，-OP3c:播放选定曲目部分的两个或多个备选材料包的选择（编辑 列表）从一个或多个文件包中获取，每个文件包可以在任何给定时间被引用和同步 沿着时间线定位。在每种情况下，顶级文件包都链接到一个Essential容器，每个Essential容器都可以 包含单个要素或多个要素的交错。此外，在每个 在这种情况下，一个或多个essence容器可能位于文件内部或外部。本标准定义了操作限制、结构元数据对象和应 适用于MXF文件格式规范，以在与交换MXF文件时实现互操作性 这些操作模式。这些操作模式要求对内部精华容器使用身体分区。细分 每个使用主体分区的essence容器都是可选的。

This standard defines operational patterns 1c, 2c and 3c, as defined in SMPTE 377M section 7, for the exchange of MXF files that represent the following levels of file complexity:--OP1c: A choice of 2 or more alternate material packages that play out selected tracks of either a single file package or two or more synchronized file packages,--OP2c: A choice of 2 or more alternate material packages that play out selected tracks of either a sequence of single file packages, or a sequence of two or more synchronized file packages,--OP3c: A choice of 2 or more alternate material packages that play out selected portions of tracks (edit list) from one or more file packages each of which may be referenced and synchronized at any given position along the timeline.In each case, a top-level file package is linked to an essence container where each essence container may comprise either a single essence element or an interleave of multiple essence elements. Furthermore, in each case, one or more of the essence containers may be internal or external to the file.This standard defines the operating restrictions, structural metadata objects and individual attributes that shall be applied to the MXF file format specification to achieve interoperability when exchanging an MXF file with these operational patterns.These operational patterns require the use of body partitions for internal essence containers. Subdivision of each essence container by using body partitions is optional.