[z3-five] Some design questions

[Andreas Jung]

In TextIndexNG2 I worked a lot with auto-configured registries for parsers 
(by language), converters
(by mime-type), stopwords (by language) etc. For a given key the registry 
returned a corresponding class
or class instance....lots of implicit magic....In V3 I want to make things 
more configurable. What is the way
to go? Extending ZCML? E.g. I want to register a converter class in html.py 
for a list of mime-types..a class
handling stopwords should be configured for a set of languages (but only 
those languages were we have existing
word lists). Another problem is efficiency....if an index handles only one 
language then subsequent lookups
for the same language dependant classes (always the german stopwords etc.) 
must be cached somehow (it does not
make sense to re-read the same stopword files over and over again).

What is the best way to address these problems?

Andreas
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