The lowest layer of the architecture represents the individual data source types and data sources that IBM Cognos BI supports.

架构的最低层表示IBM Cognos BI支持的单个数据源类型和数据源。

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The mapping table also allows the user to convert source types to target types, or define constant mappings that set constant values to items in the target schema.

映射表还允许用户将源类型转化成目标类型，或定义常量映射 来将常量设置为目标架构中的项目。

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SDO is an API (application programming interface) that helps simplify and unify data access across different data source types, which is becoming more and more crucial in the IT industry.

如何访问不同数据源类型的数据在IT业界变得越来越重要，SDO是一种应用程序编程接口(API)，可以简化和统一对异构数据的访问。

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Once you become a Linux Jedi Master feel free to take a swim in the ocean of alternative open source filesystem types.

ENGADGET: A guide to Slackware and Arch Linux: getting your hands dirty with Linux

In the meantime, brainy types can feel free to click on the source link for more nuggets of wisdom about the research.

ENGADGET: Researchers create space-time crystal schematic, still won't undo those ill-advised high school photos

Some types are thought to have to have a genetic source, often running in families.

BBC: writing