<h1>Serials subscription add & modify help</h1>

<ul>
	<h2>Subscription information bloc</h2>
	<p>it contains the name of the librarian that created the subscription, the name of the supplier providing the subscription, the cost and the budget affected. It also contains the title of the biblio managed by the subscription.</p>
	<h2>Planning information bloc</h2>
	<p>it contains various information to calculate arrival dates.</p>
	<h2>Subscription length</h2>
	<p>one field in this bloc should be filled : the subscription length can be calculated in weeks, months or number of issues to recieve</p>
	<h2>Numbering calculation</h2>
	<p>The numbering of issues recieved can be a complex formulas. The "numbering formula" can be filled with any text and/or numbers. 3 special tokens <b>{X} {Y}</b> and <b>{Z}</b> can be user to define the calculation formula. XYZ values are calculated with the following method:</p>
		<ul>
			<li>Add : the number here is added to XYZ</li>
			<li>once every : the number before can be added on every issue or less often</li>
			<li>Starting period : if your subscription start at the beginning of a period, let it empty. Otherwise, fill it (see sample below)</li>
			<li>When more than : if the calculated number is more than the value here</li>
			<li>Set back to : if the previous condition is valid, the calculated number is set to this one instead</li>
			<li>Last value / begins with : the last value calculated or the 1st value (when adding a subscription</li>
		</ul>
	<h2>Sample</h2>
	Consider the formula <b>N°{X}/{Y}</b>. The following XYZ settings :
	<ul>
		<li> <b>X</b> add <b>1</b> once every <b>4</b> times. When more than <b>9999999</b> set back to <b>empty</b>. Begins with <b>2004</b></li>
		<li> <b>Y</b> add <b>1</b> once every <b>1</b> times. When more than <b>4</b> set back to <b>4</b>. Begins with <b>1</b></li>
	</ul>
	will result in the following issues numbers :
	<p>N°2004/1, N°2004/2, N°2004/3, N°2004/4, N°2005/1, N°2005/2, N°2005/3, N°2005/4, N°2006/1</p>
	<h2>Sample 2</h2>
	A more complex sample : you have a subscription, starting in April, for a serial which is numbered as the previous sample.
	In this case, you'll have to define the starting period to 4 : the year number last for 12 months usually, but for the 1st year, it starts to 4 because you take the subscription in april. In this case, put 4 into the starting period, to have only 8 issues with 2004 and move to 2005 at the beginning of the next year.
	<h2>Note:</h2>
	When you add a subscription, Koha consider you already have done the order, or that you will do it soon. So, NO information is sent to the acquisition module. This is not the case when the subscription expires. In this case, a subscription renewal creates a "suggestion" that is sent to the acquisition module.