Bibliothekarische Stimmen. Independent, täglich.

24. Oktober 2011
von Adrian Pohl
Kommentare deaktiviert für My Problems with FRBR I: Naming

My Problems with FRBR I: Naming

The so called Functional Requirements of Bibliographic Records (FRBR) are a vital source of discussions in the library world since the 1990s. I mostly tried to don't get too deep into these discussions but haven't evaded them altogether. As FRBR discussions probably won't go away any time soon I will scribble down the basic two or three problems I have with FRBR, starting today with the label it was given: "Functional Requirements for Bibliographic Records".[1]

Functional Requirements? Really?

What I don't get is why FRBR actually goes by the name "Functional Requirements for Bibliographic Records"? (I don't understand much about functional requirements in software engineering or about requirements engineering. Maybe that's my problem...) Shouldn't it be called something like CMBU ("Conceptual Model of the Bibliographic Universe"). When I hear "functional requirements" in the context of bibliographic data, I think of the functionalities a bibliographic database should offer its users.[2] Unfortunately, FRBR is only indirectly talking about functional requirements in this sense as FRBR is focused on creating a data model. One just has to take a look at the FRBR paper by IFLA, Barbara Tillett's text "What is FRBR?" or the "FRBR" wikipedia entry. All of them describe FRBR as a "conceptual model"or "entity-relationship model".

And that is where I see a problem. I am highly in favour of creating functional requirements for bibliographic data covering different use cases. It really is important to do this if you want to develop a good conceptual model for bibliographic data. But one shouldn't confuse "functional requirements" with "conceptual model" as one data model can serve functional requirements from different users, use cases and contexts and as a data model can be created to only satisfy a small number of functional requirements.

Do we need new terminology to describe functional requirements?

Why develop a new language to talk about bibliographic resources if you can describe functional requirements in everday language that is used to talk about bibliographic resources? Users don't want to "select an expression of a work" nobody will tell you that he needs this function. They want to "find a French translation of Moby Dick", an "annotated version of Shakespeare's Julius Caesar", "get an overview over the œuvre of John Dewey" etc. So why doesn't FRBR use common language to show what these functions are users want? Instead, with FRBR, a data model is designed and a new language to talk about bibliographic resources and this language is then - in a circular move - used to formulate requirements for bibliographic data like
  • Find all manifestations embodying the works for which a given person or corporate body is responsible
  • Identify an expression of a work
  • Obtain a manifestation
Have you ever heard a user asking to "obtain a manifestation or expression of a work"? I believe not.

Requirements are always attached to use cases

Functional requirements, for what purpose anyway? - For tasks with which the libraries' users see themselves confronted. But there are so many other purposes one can use bibliographic data for, e.g. building public domain calculators or creating bibliographies and reference lists for research or lectures. And you definitely curtail your opportunities to re-use data for other purposes by adopting a model based on functional requirements that are quite narrowly tailored in the light of specific usage. For example, identifying a work in a FRBR sense doesn't help in a legal context where e.g. a translation is a work in its own right.

Am I just ignorant? Does FRBR actually provide what its name says? I would like to be disabused in my  opinion. So please, requirement engineers and bibliographs, explain it to me.

[1] I don't believe these points are very novel but I only could follow some FRBR discussions during the last three years. And they might be wrong. I am happy about any feedback.

[2] Actually, I also think the second part of the lable isn't appropriate as well. It doesn't make much sense to speak of Functional Requirements for Bibliographic Records but for bibliographic databases. It is a database as a whole that has to fulfil specific function in the first place and not individual records.