[syslog-ng] syslog-ng-3.38.1 causing type hint errors in patterndb - bug?

[Evan Rempel]

We have a patterndb file that contains both patterns and values with 
fixed text that include a strings of the form "xxxx (yyy)" which now can 
not be loaded by the patterndb.

Syslog-ng throws the error

Error parsing pattern database file; ... Error compiling value template, 
rule=FLARE-3543, name=AUTHPROGRAM, value=su(pam_unix), error=Unknown 
type specified in type hinting: su'

I have not enabled the version 4.0 testing of type hinting. The version 
configuration is

@version: 3.36

I am unable to find documentation for the full syntax of the patterndb 
file (seems to have been lost from the docs since perhaps 3.16?)

Is there a patterndb syntax specification document?

I would expect that even when type hinting is enabled in the patterndb 
file, given that it is an XML document, that the type hinting would be 
part of the XML tag metadata, rather than part of the XML static data.

-- 
Evan