[xml] What is difference between xmlTextReaderNext() and xmlTextReaderNextSibling()?

["Andrew W. Nosenko" <andrew w nosenko gmail com>]

Sorry for possible stupid question, but what is difference between
xmlTextReaderNext() and xmlTextReaderNextSibling()?

Documentation for both say that they do
   "Skip to the node following the current one in document order
while avoiding the subtree if any".

Therefore, the question raised: what is functional difference between them?

--
Andrew W. Nosenko <andrew w nosenko gmail com>