QXmlSchema¶

Note

This class was introduced in Qt 4.6

Synopsis¶

Functions¶

def documentUri ()
def isValid ()
def load (data[, documentUri=QUrl()])
def load (source)
def load (source[, documentUri=QUrl()])
def messageHandler ()
def namePool ()
def networkAccessManager ()
def setMessageHandler (handler)
def setNetworkAccessManager (networkmanager)
def setUriResolver (resolver)
def uriResolver ()

Detailed Description¶

The PySide.QtXmlPatterns.QXmlSchema class provides loading and validation of a W3C XML Schema.

The PySide.QtXmlPatterns.QXmlSchema class loads, compiles and validates W3C XML Schema files that can be used further for validation of XML instance documents via PySide.QtXmlPatterns.QXmlSchemaValidator .

The following example shows how to load a XML Schema file from the network and test whether it is a valid schema document:
url = QUrl("http://www.schema-example.org/myschema.xsd")

schema = QXmlSchema()
if schema.load(url):
    qDebug("schema is valid")
else:
    qDebug("schema is invalid")

XML Schema Version¶

This class is used to represent schemas that conform to the XML Schema 1.0 specification.

See also

PySide.QtXmlPatterns.QXmlSchemaValidator XML Schema Validation Example

class PySide.QtXmlPatterns.QXmlSchema¶

class PySide.QtXmlPatterns.QXmlSchema(other)

Parameters:	other – `PySide.QtXmlPatterns.QXmlSchema`

Constructs an invalid, empty schema that cannot be used until PySide.QtXmlPatterns.QXmlSchema.load() is called.

Constructs a PySide.QtXmlPatterns.QXmlSchema that is a copy of other . The new instance will share resources with the existing schema to the extent possible.

PySide.QtXmlPatterns.QXmlSchema.documentUri()¶

Return type:	`PySide.QtCore.QUrl`

Returns the document URI of the schema or an empty URI if no schema has been set.

PySide.QtXmlPatterns.QXmlSchema.isValid()¶

Return type:	`PySide.QtCore.bool`

Returns true if this schema is valid. Examples of invalid schemas are ones that contain syntax errors or that do not conform the W3C XML Schema specification.

PySide.QtXmlPatterns.QXmlSchema.load(source[, documentUri=QUrl()])¶

Parameters:	source – `PySide.QtCore.QIODevice` documentUri – `PySide.QtCore.QUrl`
Return type:	`PySide.QtCore.bool`

Sets this PySide.QtXmlPatterns.QXmlSchema to a schema read from the source device. The device must have been opened with at least QIODevice.ReadOnly .

documentUri represents the schema obtained from the source device. It is the base URI of the schema, that is used internally to resolve relative URIs that appear in the schema, and for message reporting.

If source is null or not readable, or if documentUri is not a valid URI, behavior is undefined.

If the schema is invalid , false is returned and the behavior is undefined.

Example:

file = QFile("myschema.xsd")
file.open(QIODevice.ReadOnly)

schema = QXmlSchema()
schema.load(file, QUrl.fromLocalFile(file.fileName()))

if schema.isValid():
    qDebug("schema is valid")
else:
    qDebug("schema is invalid")

PySide.QtXmlPatterns.QXmlSchema.load(data[, documentUri=QUrl()])

Parameters:	data – `PySide.QtCore.QByteArray` documentUri – `PySide.QtCore.QUrl`
Return type:	`PySide.QtCore.bool`

Sets this PySide.QtXmlPatterns.QXmlSchema to a schema read from the data

documentUri represents the schema obtained from the data . It is the base URI of the schema, that is used internally to resolve relative URIs that appear in the schema, and for message reporting.

If documentUri is not a valid URI, behavior is undefined.

If the schema is invalid , false is returned and the behavior is undefined.

Example:

data = QByteArray("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
                  + "<xsd:schema"
                  + "        xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\""
                  + "        xmlns=\"http://qt.nokia.com/xmlschematest\""
                  + "        targetNamespace=\"http://qt.nokia.com/xmlschematest\""
                  + "        version=\"1.0\""
                  + "        elementFormDefault=\"qualified\">"
                  + "</xsd:schema>" )

schema = QXmlSchema()
schema.load(data)

if schema.isValid():
    qDebug("schema is valid")
else:
    qDebug("schema is invalid")

PySide.QtXmlPatterns.QXmlSchema.load(source)

Parameters:	source – `PySide.QtCore.QUrl`
Return type:	`PySide.QtCore.bool`

Sets this PySide.QtXmlPatterns.QXmlSchema to a schema loaded from the source URI.

If the schema is invalid , false is returned and the behavior is undefined.

Example:

url = QUrl("http://www.schema-example.org/myschema.xsd")

schema = QXmlSchema()
if schema.load(url):
    qDebug("schema is valid")
else:
    qDebug("schema is invalid")

PySide.QtXmlPatterns.QXmlSchema.messageHandler()¶

Return type:	`PySide.QtXmlPatterns.QAbstractMessageHandler`

Returns the message handler that handles compile and validation messages for this PySide.QtXmlPatterns.QXmlSchema .

PySide.QtXmlPatterns.QXmlSchema.namePool()¶

Return type:	`PySide.QtXmlPatterns.QXmlNamePool`

Returns the name pool used by this PySide.QtXmlPatterns.QXmlSchema for constructing names . There is no setter for the name pool, because mixing name pools causes errors due to name confusion.

PySide.QtXmlPatterns.QXmlSchema.networkAccessManager()¶

Return type:	`PySide.QtNetwork.QNetworkAccessManager`

Returns the network manager, or 0 if it has not been set.

PySide.QtXmlPatterns.QXmlSchema.setMessageHandler(handler)¶

Parameters:	handler – `PySide.QtXmlPatterns.QAbstractMessageHandler`

Changes the message handler for this PySide.QtXmlPatterns.QXmlSchema to handler . The schema sends all compile and validation messages to this message handler. PySide.QtXmlPatterns.QXmlSchema does not take ownership of handler .

Normally, the default message handler is sufficient. It writes compile and validation messages to stderr . The default message handler includes color codes if stderr can render colors.

When PySide.QtXmlPatterns.QXmlSchema calls QAbstractMessageHandler.message() , the arguments are as follows:

message() argument	Semantics
`QtMsgType` type	Only `QtWarningMsg` and `QtFatalMsg` are used. The former identifies a warning, while the latter identifies an error.
const `PySide.QtCore.QString` & description	An XHTML document which is the actual message. It is translated into the current language.
const `PySide.QtCore.QUrl` &identifier	Identifies the error with a URI, where the fragment is the error code, and the rest of the URI is the error namespace.
const `PySide.QtXmlPatterns.QSourceLocation` & sourceLocation	Identifies where the error occurred.

PySide.QtXmlPatterns.QXmlSchema.setNetworkAccessManager(networkmanager)¶

Parameters:	networkmanager – `PySide.QtNetwork.QNetworkAccessManager`

Sets the network manager to manager . PySide.QtXmlPatterns.QXmlSchema does not take ownership of manager .

PySide.QtXmlPatterns.QXmlSchema.setUriResolver(resolver)¶

Parameters:	resolver – `PySide.QtXmlPatterns.QAbstractUriResolver`

Sets the URI resolver to resolver . PySide.QtXmlPatterns.QXmlSchema does not take ownership of resolver .

PySide.QtXmlPatterns.QXmlSchema.uriResolver()¶

Return type:	`PySide.QtXmlPatterns.QAbstractUriResolver`

Returns the schema’s URI resolver. If no URI resolver has been set, QtXmlPatterns will use the URIs in schemas as they are.

The URI resolver provides a level of abstraction, or polymorphic URIs . A resolver can rewrite logical URIs to physical ones, or it can translate obsolete or invalid URIs to valid ones.

When QtXmlPatterns calls QAbstractUriResolver.resolve() the absolute URI is the URI mandated by the schema specification, and the relative URI is the URI specified by the user.

Table Of Contents

Quick search

QXmlSchema¶

Synopsis¶

Functions¶

Detailed Description¶

XML Schema Version¶