php xmlParsePITarget: invalid name prefix 'xml' error

Question

Can one help me understand (and fix this error). The error reads:

Warning: simplexml_load_file(): /home/jeffreycwitt/webapps/lombardpress_instances/petrusplaoul/lombardpress/phpfunctions/../../projectfiles/GitTextfiles/lectio1/lectio1.xml:2: parser warning : xmlParsePITarget: invalid name prefix 'xml' in home/jeffreycwitt/webapps/lombardpress_instances/petrusplaoul/lombardpress/phpfunctions/generalfunctions.php on line 47

The error seems to have something to do with my schema delcarations at the beginning of my xml files.

The declaration at the beginning of the file looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<?xml-model href="https://bitbucket.org/lombardpress/lombardpress-schema/raw/master/LombardPressODD.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?>
<?xml-model href="https://bitbucket.org/lombardpress/lombardpress-schema/raw/master/LombardPressODD.rng" type="application/xml" schematypens="http://purl.oclc.org/dsdl/schematron"?>
<TEI xmlns="http://www.tei-c.org/ns/1.0" xmlns:xi="http://www.w3.org/2001/XInclude">
    <teiHeader>

I don't understand why I'm getting the warning. On systems where I can turn of "display_errors" this hasn't been a problem. But now I'm working with a system in which I do not have access to the php.ini file.

Ideally, I'd like to solve the problem so that I don't have any warnings. However, I need the schema declarations in place for other reasons.

Suggestions. jw

you mean the path of the file being processed? That would be annoying as it would take some doing. — Jeff
– Jeff, Commented Mar 10, 2014 at 20:12
hmm, I'm not sure. Is there way to determine if simple_has a limit on the path length? And isn't the error complaining about the xml prefix within the document -- so it must be finding the document, right? — Jeff
– Jeff, Commented Mar 10, 2014 at 20:18
Seems like PIs that are prefixed with xml must be listed explicitly as exceptions. See e.g. git.gnome.org/browse/libxml2/tree/…, line 194. In your case, "xml-stylesheet" should already be defined - perhaps you can locate it? — Mathias Müller
– Mathias Müller, Commented Mar 11, 2014 at 12:35

Paul Sweatte · Accepted Answer · 2015-07-07 23:11:52Z

6

There is one issue:

The <?xml prefix is reserved for the first line

Use an underscore as a simple fix:

<?_xml-model href="https://bitbucket.org/lombardpress/lombardpress-schema/raw/master/LombardPressODD.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?>
<?_xml-model href="https://bitbucket.org/lombardpress/lombardpress-schema/raw/master/LombardPressODD.rng" type="application/xml" schematypens="http://purl.oclc.org/dsdl/schematron"?>

References

Namespaces in XML 1.0: Reserved Prefixes and Namespace Names

edited Jul 7, 2015 at 23:11

answered Apr 8, 2014 at 2:08

Paul Sweatte

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