Databases
StackOverflow2013
Postsdbo
POWhy is node order important in XML?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POWhy is node order important in XML?
    primarykey
    data
    text
    <p>I've been dealing with an API recently that requires nodes of the XML document to be in a particular order. I was wondering why they feel the need to enforce this when I can find absolutely no reason why things should be like this.</p> <p>For intance, this would be correct (xml greatly simplified)</p> <pre><code>&lt;transaction&gt; &lt;address&gt;1 main st&lt;/address&gt; &lt;amount&gt;100&lt;/amount&gt; &lt;orderId&gt;1234&lt;/orderId&gt; &lt;/transaction&gt; </code></pre> <p>but this would return an error</p> <pre><code>&lt;transaction&gt; &lt;address&gt;1 main st&lt;/address&gt; &lt;orderId&gt;1234&lt;/orderId&gt; &lt;amount&gt;100&lt;/amount&gt; &lt;/transaction&gt; </code></pre> <p>At first I thought it would be so that they can store things in a list/array form and have the indices always refer to the same node. I understand why sending sibling nodes that have the same name in the same order is important as explained <a href="https://stackoverflow.com/questions/1131495/in-xml-is-order-important">in this question</a>. However, some nodes can be left out:</p> <pre><code>&lt;transaction&gt; &lt;amount&gt;100&lt;/amount&gt; &lt;orderId&gt;1234&lt;/orderId&gt; &lt;/transaction&gt; </code></pre> <p>So in the third example, amount and orderId would now be at [0] and [1] instead of at [1] and [2] in the first (correct) example.</p> <p>Another thought would be that they process the XML as a string and require that they always know what nodes come after each other, but again since omitting nodes is allowed, that theory doesn't make sense.</p> <p>Can anyone explain to me why the order in which I give nodes matters? Or am I just dealing with an API that is old and grumpy?</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USCommunity
    1. UShelloandre
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POWhy is node order important in XML?
      1. This table or related slice is empty.
      1. VTDownMod
    2. VO
      singulars
      1. POWhy is node order important in XML?
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POWhy is node order important in XML?
      1. This table or related slice is empty.
      1. VTUpMod
    1. CODoes the XML follow a DTD?
      singulars
      1. POWhy is node order important in XML?
      1. USMac
    2. COI don't understand the downvotes or close votes here.
      singulars
      1. POWhy is node order important in XML?
      1. USJohn Saunders
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload