Hello
As we look to more and more ci verification of the XML Schemas that we develop
for MPEG DASH, we have started to leverage the flexibility of DTD ENTITY
definitions when creating XML schema pattern facets. Out Github uses lxml to
verify pull requests, but it seems that the defined entities are not being used.
I have created the following example files to test this
2-base.xsd
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE schema [
<!ENTITY lowalpha "a-z">
<!ENTITY hialpha "A-Z">
<!ENTITY alpha "&lowalpha;&hialpha;">
<!ENTITY digit "0-9">
<!ENTITY uword
"([&digit;]{1,4}|[1-5][&digit;]{4}|6[0-4][&digit;]{3}|65[0-4][&digit;]{2}|655[0-2][&digit;]|6553[0-5])">
<!ENTITY Port ":&uword;">
]>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"; xmlns="urn:paul:types2"
targetNamespace="urn:paul:types2" elementFormDefault="qualified"
attributeFormDefault="unqualified">
<xs:simpleType name="PortType">
<xs:restriction base="xs:string">
<xs:pattern value="&Port;"/>
</xs:restriction>
</xs:simpleType>
</xs:schema>
2-main.xsd
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"; xmlns="urn:paul:main2"
xmlns:t2="urn:paul:types2" targetNamespace="urn:paul:main2"
elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:import namespace="urn:paul:types2" schemaLocation="2-base.xsd"/>
<xs:element name="Port" type="t2:PortType"/>
</xs:schema>
2.xml
<?xml version="1.0" encoding="UTF-8"?>
<Port xmlns="urn:paul:main2"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="urn:paul:main2 2-main.xsd">:10100</Port>
2.xml validates OK in XMLspy and if the value is changed to :101001 for
example, a match error is given so we know the pattern is progressing through
the xs:import etc
2.xml does not validate when used against lxml
from lxml import etree
with open('2-main.xsd', 'r') as schema_file:
my_schema=etree.XMLSchema(etree.parse(schema_file))
filename='2.xml'
with open(filename) as file:
my_xml=etree.parse(file)
my_schema.assertValid(my_xml)
This gives the following error
Traceback (most recent call last):
File "G:\lxml-test\test1b.py", line 11, in <module>
my_schema.assertValid(my_xml)
File "src\lxml\etree.pyx", line 3623, in lxml.etree._Validator.assertValid
lxml.etree.DocumentInvalid: Element '{urn:paul:main1}Port': [facet 'pattern']
The value ':10100' is not accepted by the pattern '[]+'., line 2
Is this something that 'should' be supported by lxml? If so, am I missing
something in the validation?
Appreciate any hints, guidance etc
Paul
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