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Linas Vepstas 1998-04-12 20:08:54 +00:00
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src/engine/ofx-dtd-idl.txt
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I have this nutty idea that maybe SGML/XML DTD's can be used as a
kind-of corba-like IDL of sorts. Has anyone pondered this, or know
of any resources?
----------
To be concrete, here's an example:
OFX (Open Financial Exchange) defines some SGML DTD's that describe a
document that contains financial data. An OFX document would look
vaguely like this:
<transaction>
<date>March 10, 1998</date>
<amount>$300.00</amount>
<description>Buy new microwave oven</description>
</transaction>
Quicken and bank web sites send these things to each other to do on-line
banking.
I am involved in a project to create a GPL'ed Quicken look-alike /
work-alike personal-finance package. Currently, our C++ classes
look vaguely like:
class Transaction {
public:
void SetDate (time_t date);
time_t GetDate (void);
void SetAmount (double amt);
double GetAmount (void);
void SetDescription (char *);
char * GetDescription (void);
private:
time_t date;
double amount;
char * description;
};
Lists of transactions form an account, etc.
I hope it is now obvious to the casual reader that our in-memory layout
of accounts and transactions vaguely resembles the ASCII layout of an
OFX document. In order to provide on-line banking features in our app,
I'd like to get the in-memory layout resemble the ofx document as much
as possible. Thus, the obvious should now be obvious:
Are there any packages that can
(a) take SGML/XML DTD's and turn them into C/C++ structs/classes?
(b) parse the incoming text document, and build the corresponding
C/C++ linked-lists/trees in memory?
---------------------------------------------------------------
More specifically, given the DTD
<!ELEMENT transaction - - (date, amount, description) >
<!ELEMENT date - - %datetype >
<!ELEMENT amount - - %numerictype >
<!ELEMENT description - - %stringtype >
I want something that will read this, and *automatically* spit out the
following ascii stream:
class Transaction {
time_t date;
double amount;
char * description;
};
---------------------------------------------------------------
James Clark's SGML/Parser (SP) http://www.jclark.com/sp/index.htm
Jade
dssslist@mulberrytech.com
--------------------------------------------------------------
--linas
10 March 1998