Add option to omit DOCTYPE for XML output

Submitted by Gerrit Imsieke

Assigned to poppler-bugs

Description

Currently (I’m using 0.57.0 on Cygwin), with the -xml option, there is always a DOCTYPE declaration with no public identifier and the system identifier 'pdf2xml.dtd'. The issue is that I can’t use an XML catalog to direct pdf2xml.dtd to a (possibly empty) DTD. This is an issue with relative paths as system identifiers. It is described on http://www.sagehill.net/docbookxsl/WriteCatalog.html#RelativeSysId As a consequence, I need to remove the DOCTYPE line manually or with xmllint in order to be able to process the output with Java-based tools such as oXygen, Saxon, or XML Calabash. Please add either a public identifier (any non-empty string will do) that can be diverted by means of an XML catalog, or add a command-line option not to issue a DOCTYPE declaration at all.

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