What causes this inconsistency in xml parsing?

3 次查看（过去 30 天）
Nathan Jessurun
Nathan Jessurun 2018-7-9
回答： Nathan Jessurun 2018-7-17
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
  4 个评论
显示 2更早的评论
Guillaume
Guillaume 2018-7-9
xml2struct seems to be able to handle that properly. From reading the code, it would appear that it just discards these #text empty children.
Nathan Jessurun
Nathan Jessurun 2018-7-9
Thanks for the suggestion! It seems to work fine. Though, it is a shame that a wrapper file has to be used for very simple information extraction. Would it be worth contacting Mathworks, or do they not guarantee any reliable performance for Java-based functions?

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Nathan Jessurun
Nathan Jessurun 2018-7-17
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.

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Structured Data and XML Documents 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by