How to create dictionaryFourPsfc HDT

[SamueleFacenda]

I'm converting an rdf to hdt with the provided tool. I've set dictionary.type = <http://purl.org/HDT/hdt#dictionaryFourPsfc> in my conversion properties but I get Exception in thread "main" com.the_qa_company.qendpoint.core.exceptions.IllegalFormatException: Implementation of write dictionary not found for <http://purl.org/HDT/hdt#dictionaryFourPsfc>. I've started looking at the code, it looks like KCatMerger is the only class calling the right overload of DictionaryFactory.createWriteDictionary, the one that can create a write dictionary of type DICTIONARY_TYPE_VALUE_FOUR_PSFC_SECTION, because there is another overload that can't build that type of dictionary. But I'm not able to make it work anyway, what options should I set? I've also tried converting another hdt to dictionaryFourPsfc but it looks like there is no viable conversion to dictionaryFourPsfc.

[ate47]

You can't, the disk indexer isn't supporting PSFC dictionaries. The PSFC dict is a remnant of the rdfhdt/hdt-java library and is supported. You can find a list of the supported dictionaries here in the Wiki.

[SamueleFacenda]

Thanks, that wans't clear since -printoptions was giving more choice. I suggest moving that part of the wiki to the rdf2hdt specific section, since it's related to that command.

[ate47]

It's because the memory loaders accept this dictionary. But it is an outdated and slower dictionary. I suggest you to use the MSDL (dictionaryMultiObjLang), it has the same features, but lighter and faster