Hello

The no_network argumenr to the XMLParser constructor does not seem to be working as described.

The following

import io

from lxml import etree

schema='''<schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="urn:paulhiggs:my-patch" elementFormDefault="qualified" attributeFormDefault="unqualified">

    <!-- Include patch operations from RFC5261 -->

    <include schemaLocation="https://www.iana.org/assignments/xml-registry/schema/patch-ops.xsd"/>

    <element name="Patch" type="PatchType"/>

    <!-- Patch -->

    <complexType name="PatchType">

        <choice minOccurs="1" maxOccurs="unbounded">

            <element name="add" type="add"/>

            <element name="remove" type="remove"/>

            <element name="replace" type="replace"/>

        </choice>

        <attribute name="paulsAttrib" type="string" use="required"/>

    </complexType>

</schema>

'''

parser=etree.XMLParser(load_dtd=True, no_network=False, huge_tree=True, resolve_entities=True)

s=etree.parse(io.StringIO(schema), parser)

my_schema=etree.XMLSchema(s)

yields an unexpected error

G:\lxml-test>python 10.py

Traceback (most recent call last):

  File "G:\lxml-test\10.py", line 28, in <module>

    my_schema=etree.XMLSchema(s)

  File "src\lxml\xmlschema.pxi", line 88, in lxml.etree.XMLSchema.__init__

lxml.etree.XMLSchemaParseError: Element '{http://www.w3.org/2001/XMLSchema}include': Failed to load the document 'https://www.iana.org/assignments/xml-registry/schema/patch-ops.xsd' for inclusion., line 3

If I curl -O https://www.iana.org/assignments/xml-registry/schema/patch-ops.xsd and change to <include schemaLocation=" patch-ops.xsd"/> the loading of the schema is successful