要获得必须购买的功能或是免费的功能，必须下载30天试用包。

To obtain either the features you must purchase or the no-charge features, you must download the 30-day trial package.

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XML_NITF包：下载并试用这个针对NITF 3.1版本的xml解析器，它提供了访问文档主要成分的各种方法。

The XML_NITF package: Download and try a NITF XML parser, designed with NITF version 3.1, with various methods to access the major elements of documents.

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惟一的差异是，如果用户使用修订包映像运行新安装，那么会安装试用许可证。

The only exception is that if the user uses the fix pack image to run a new installation, a try-and-buy license is installed.

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