<h2>WORKING WITH FILE MASKS</h2>
To simplify the life you may organize uploaded files in the groups (folders) using File Masks.<br/><br/>
For example files <br/>
 <i>ac_h0_mfi_20090828_v05.cdf; ac_h0_mfi_20090829_v05.cdf; ac_h0_mfi_20090830_v05.cdf</i>  
<br/>
could be associated with file masks <br/>
 <b><i>ac_h0_mfi_200908*cdf</i></b> OR  <b><i>ac_h0_mfi_2009</i></b> OR  <b><i>ac_h0_mfi_</i></b>....etc...<br/><br/>
Organization of your files into "mask" folders  is
made automatically if you introduce a file mask while defining a parameter. 
Each file could belong to <b>ONE</b> file mask only. If you create a mask more common than existing before
all files that fit new mask will be associated with the new mask and old association will be destroyed.<br/><br/>
In the above example mask <b><i>ac_h0_mfi_</i></b> is more common than <b><i>ac_h0_mfi_2009</i></b> and 
<b><i>ac_h0_mfi_200908</i></b> and they will be (where  possible) replaced by <b><i>ac_h0_mfi_</i></b>.
<br/><br/>  
<ul><b>Several simple rules:</b>
<br/> 
<li>Mask could include  ONE and ONLY ONE "<b>*</b>" symbol  
<li>Mask should not be shorter than 5 letters
<li>Mask should not start with "<b>*</b>"
<li>It is prohibited to replace  more common mask by less common one. In the above example you cannot
     replace <b><i>ac_h0_mfi_</i></b> with <b><i>ac_h0_mfi_2009</i></b> or <b><i>ac_h0_mfi_200908</i></b>.
<li>Association of different types of files with one mask (ac_h1_mfi..., ac_h2_mfi...,
     ac_h2_mfi => ac_h) could produce an error.
<li>Association of the parameters from one file with different masks produces an error
</ul>