MATLAB: What causes this inconsistency in xml parsing

documentelementdomparsingxmlxmlreadxmlwrite

I have the following XML file:

<?xml version="1.0" encoding="utf-8"?>
<AddressBook>
 <Entry>
    <Name>Friendly J. Mathworker</Name>
    <PhoneNumber>(508) 647-7000</PhoneNumber>
    <Address hasZip="no" type="work">3 Apple Hill Dr, Natick MA</Address>
 </Entry>
 <Entry>
    <Name>Joe P. Surname</Name>
    <PhoneNumber>(334) 647-8898</PhoneNumber>
    <Address hasZip="no" type="work">123 Addr Lane, Chicago NY</Address>
 </Entry>
 <Entry>
    <Name>Mary Sue Lastname</Name>
    <PhoneNumber>(508) 552-5698</PhoneNumber>
    <Address hasZip="no" type="home">456 Another Addr, Boston OR</Address>
 </Entry>
</AddressBook>

Which I capture in DOM form with

dom = xmlread(file)
xmlEl = dom.getDocumentElement();

There should be 3 first-level children, correct? But when I call

xmlEl.getLength();

the answer is 7!

It gets better: I then call

xmlwrite(dom);

After which xmlEl.getLength returns 3! What is happening here? Any help would be appreciated

Best Answer

Per Guillaume's answer in the a comment above (https://www.mathworks.com/matlabcentral/answers/409506-what-causes-this-inconsistency-in-xml-parsing#comment_587489) - these extra children are text nodes, which represent the literal space in the DOM tree. Undocumented behavior in xmlwrite removes these spaces when printing, which alters the tree and yields the correct number of children.

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MATLAB: How to include a MATLAB figure in a LaTeX document

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MATLAB: How to storage data for arrays

An example with 2 entries (change n to increase the number of entries):

n = 2
for ii = 1:n
    Phone(ii).name    = input('Enter the name: ', 's');
    Phone(ii).number  = input('Enter the phone number: ','s');
    Phone(ii).address = input('Enter the address: ','s');
end

I am indexing the structure Phone where ii = 1,2,...

You can apply this syntax to your case w/o using the loop.

Best Answer

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