what does error mean and how to fix it

<currentversion vob="<vobname>" label="<labal>"/>

<export vob="<vobname>" bra开发者_运维百科nch="<branch>" label="<label>"/>

error :

The value of attribute "v" associated with an element type "currentversion" must not contain the '<' character.

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Replace < with < (lt=lower than) and > with > (gt = greater than) if it is not part of a tag...

<currentversion vob="&lt;vobname&gt;" label="&lt;labal&gt;"/>

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The error message means exactly what it says, and you fix it by ensuring that all "&" and "<" characters in your data are escaped as "&" and "<" respectively.