Processing instructions and comments are also reduced to special tag names that are not available in XML: PI for the former, comment for the latter.

处理指令和注释也简化了标签名，这在XML中是无法实现的：前者用PI，后者用COMMENT。

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If a special tag-reader is waved near the arm, a radio signal prompts the chip to transmit an identification number which is used to call up information about the wearer in a computer database.

当专用标记阅读器在手臂附近晃动，无线电信号就会激活微芯片传送识别码，从而调出电脑数据库中该客户信息。

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For example, if a PDF document is written, the application tag could be set to a value indicating a special PDF tag.

例如，如果写入PD f文档，那么应用程序标记可设置为用来指示特殊PD f标记的值。

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Young adults would use paint in special cans to spray their "tag" on walls and train cars around the city.

VOA: special.2009.04.08

Employees who receive this accolade wear a special name tag all year.

ECONOMIST: How to tailor pay to performance

Researchers have also devised sneaky ways to tag parts of the brain that are of special interest, so that they can be followed more easily from slice to slice.

ECONOMIST: Connectomics aims to map the atlas of the brain

Although special interests have been lobbying furiously for another extension of the TAG program, it currently appears that this program will be allowed to expire at the end of the year.

FORBES: We Don't Need TAG Accounts, We Need Sanity At The Fed