Magritte to Relational DB

Dear All, I have been using magritte with MySql for a while. Today I discovered that something more than basic type coercion is needed for writing values described by MASingleOptionDescription's to the database, since the type is defined its #reference: . This led me to finally understand why MAStringWriter and MAStringReader are implemented as visitors. So... I figured that the task of coercing data types into and out of databases is going to be a common problem, and so I have begun a framework for doing this (properly?). http://source.lukas-renggli.ch/magritteaddons2 -- since magritteaddons is still inaccessible (lukas?) The basic scheme so far is to define visitor based reader/writers for database interfaces to use for coercion. These reader/writers are not instanciated for every value read/written, but may last the lifetime of a query (or longer) according to how the db interface makes use of them. For efficiency they also cache a single string reader and a writer for frequent re-use. I have also included a MAPriceDescription for good measure. I have got a fair bit of higher level stuff working with MySQL, but I suspect that it is not yet generic enough to be part of this framework yet. I have also posted my version of the MySql Driver which has been hacked up a bit to handle both mysql versions > 4.1 and < 4.1 If anyone finds this useful or would like to contribute their infinite db know-how please let me know. best regards Keith