[kde-doc-english] [docs] [Bug 320775] KDE Help Center is unable to display writing_scrollkeeper_omf_files.xml

[Christopher Yeleighton]

https://bugs.kde.org/show_bug.cgi?id=320775

--- Comment #16 from Christopher Yeleighton <giecrilj at stegny.2a.pl> ---
The protocol ghelp is implemented via an input slave.  An input slave generates
document content as a character stream (actually, it is a material character
array, which is why KDE Help Centre is so slow).  The slave generates calling
an external library to perform the transformation.  The result of the
observation used by the slave is not a character stream though; it is a
document (TODO: it should be a stream of XML events instead).  The document
internally contains a tree of nodes.  A tree is an in-memory structure with
nodes containing pointers to other nodes; in particular, this representation
does not live in a contiguous memory block and cannot be directly stored or
sent over the pipeline (wire).  All XML documents are built from pointers to
objects arranged in a hierarchical way; the objects have a well-defined common
interface you can rely upon; this is called the Document Object Model, which is
what the acronym DOM stands for.  The input slave examines the document
returned by the library and generates its textual representation which it sends
back to the client.

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