stag-autoschema.pl man page

stag-autoschema — writes the implicit stag-schema for a stag file

Synopsis

stag-autoschema -w sxpr sample-data.xml
stag-autoschema -dtd sample-data.xml

Description

Takes a stag compatible file (xml, sxpr, itext), or a file in any format plus a parser, and writes out the implicit underlying stag-schema

stag-schema should look relatively self-explanatory.

Here is an example stag-schema, shown in sxpr syntax:

(db
 (person*
  (name "s"
  (address+
   (address_type "s")
   (street "s")
   (street2? "s")
   (city "s")
   (zip? "s")))))

The database db contains zero or more persons, each person has a mandatory name and at least one address.

The cardinality mnemonics are as follows:

+
1 or more
?
0 or one
*
0 or more

The default cardinality is 1

Arguments

-p|parser FORMAT
FORMAT is one of xml, sxpr or itext, or the name of a perl module

xml assumed as default
-dtd
exports schema as DTD
-w|writer FORMAT
FORMAT is one of xml, sxpr or itext, or the name of a perl module, OR DTD

The default is sxpr

note that stag schemas exported as xml will be invalid xml, due to the use of symbols *, +, ? in the node names

Limitations

not event based - memory usage becomes exhorbitant on large files; prepare a small sample beforehand

Pod Errors

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Info

2009-12-14 perl v5.24.0 User Contributed Perl Documentation