Before parsing is possible you have to 始める，決める your
XFastDocumentHandler using setFastDocumentHandler.
Parsing starts with calling parseStream. If the parser
finds a valid xml とじ込み／提出する with the given InputSource, it calls
XFastDocumentHandler::startDocument first.
This parser 生成するs either '急速な／放蕩な' events that use integer 記念品
values for namespaces, elements and せいにするs or 'unknown' events for
elements that are unknown.
A namespace is unknown if the namespace URL was not 登録（する）d with
registerNamespace.
An element is unknown if no XFastTokenHandler is 始める，決める
or if the XFastTokenHandler does not return a valid
identifier for the elements 地元の 指名する. An element is also unknown if
the elements 地元の 指名する is known but it uses a namespace that is unknown.
Setting a XFastTokenHandler with setTokenHandler
is optional, but without a XFastTokenHandler you will only
get unknown sax events. This can be useful if you are only 利益／興味d
in the namespace 扱うing and/or the 状況 feature.
For each element the parser sends a create child element event to the
elements parent 状況 by calling
XFastContextHandler::createFastChildContext for known
elements or XFastContextHandler::createUnknownChildContext
for unknown elements.
The parent 状況 for the root element is the XFastDocumentHandler
itself.
If the parent 状況 returns an empty 言及／関連, no その上の events for
the element and all of its childs are created.
If a valid 状況 is returned this 状況 gets a start event by a call to
XFastContextHandler::startFastElement for known elements or
XFastContextHandler::startUnknownElement for unknown elements.
After 過程ing all its child elements the 状況 gets an end event by a call to
XFastContextHandler::endFastElement for known elements or
XFastContextHandler::endUnknownElement for unknown elements.
It is valid to return one instance of XFastContextHandler more
than once. It is even possible to only use the XFastDocumentHandler
by always returning a 言及／関連 to itself for each create child 状況 event.
After the last element is 過程d the parser 生成するs an end 文書
event at the XFastDocumentHandler by calling
XFastDocumentHandler::endDocument.
