On 4/29/11 3:44 AM, Tom Samplonius wrote:
While I think this would make SimpleXML more stupid, not less, as it
seems
braindead to me to allow users to create documents ambiguously and/or
which
essentially violate the XML namespace spec, I think the way to do
Allowing child elements to be unqualified is neither braindead or ambiguous. All
standalone XML documents are ambiguous, because XML is just structured information
without a definition of the structure (let alone the semantics of the information).
XMLSchemas precisely define the structure, including allowable elements, child elements,
quantities of elements and data types. And if that schema includes the attribute
'elementFormDefault="unqualified"', then child elements have to be unqualified.
And that is certainly strictly specified, unlike a schemaless XML.
In fact, it would save a lot of time, if SimpleXML had a schema mode, and
could validate and parse XML based on a provided schema. XMLReader has
validation support, but it doesn't use the schema for binding XML elements to a
data structure.
this would be to
define a magic constant and use that. E.g.
const SIMPLEXML_DEFAULT_UNPREFIXED = 0
I used 'default unprefixed' to better describe what is going to
happen in terms of
namespaces (as within the context of a namespaced document is the
only time this
would be needed): the element is going to be created in the default
namespace by
virtue of being unprefixed. This highlights to the user the ambiguity
involved (it
is not necessarily known what the default namespace is at any point),
as well as
the 'priority' the XML generation will take at that point (of adding
an unprefixed
element).
-1 for using "unqualified"; whatever is used should not be a possibly
valid
namespace name.
Well, it is possible to examine the type, so (int) -1 is distinct from "-1",
so there is no risk of considering it an actual namespace. So, like this:
$sxe->addChild('child', 123); # Adds element with namespace inherited from the
parent
$sxe->addChild('child', 123, 'urn:somenamespace'); # Adds child with specified
namespace
$sxe->addChild('child', 123, -1); # Adds child with no namespace qualification
Again, there is no problem here as <child xmlns="">123</child> is
unqualified
Rob
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