If not, can external data sources be acquired to fill the gap?
如果没有，是否可以获取外部数据源来填补这一差异？
Informix provides access to external data sources through the virtual table interface (VTI).
Informix通过虚拟表接口(VTI)提供对外部数据源的访问。
The TDI module has the capability to query external data sources to retrieve attributes and user's groups.
TDI模块能够通过查询外部数据源来获取属性和用户组。
Data source: clear definition of current available business and external data sources and future data sources if possible.
数据源：当前可用的业务数据源和外部数据源以及将来可能存在的数据源的清晰定义。
All feed data from internal as well as external data sources is cached. An embedded Derby database is provided as a default option to create the default repository for the mashup catalog.
服务器将缓存来自内部及外部数据源的所有Feed数据，同时提供一个内嵌的Derby数据库作为缺省选项来创建Mashup目录的缺省仓库。
External data sources include flat files, other databases, Internet feeds, and other sources.
外部数据源包括平面文件、其他数据库、互联网提要和其他来源。
External data sources include flat files, other databases, Internet feeds, and other sources.
外部数据源包括平面文件、其他数据库、互联网提要和其他来源。
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