Last modified: 2014-10-17 15:10:20 UTC
Parser function #ifeq with #property as one of the strings can give wrong result on zhwp. For example, on the article OpenBSD, {{#property:P373}} gives OpenBSD, but {{#ifeq:{{#property:P373}}|OpenBSD|a|b}} gives b. There's no such problem on enwp.
{{#property: }} emits wikitext with language conversion syntax in it if the wiki uses Language Converter. I remember I brought up a topic in wikidata-tech@lists about the expected output of {{#property: }} but got no response. :/
Yes, the problem over here is that we use a language variant aware output format (which only gets transformed into the actual output after parser functions like ifeq are being executed). You can use Lua to get the raw values without variant conversion.
Per above, this is not anything we can easily change... the parser function should only be used for very simply display logic. Once you want to more, please use Lua.
