The Stag project currently consists of two perl modules,
both of which are available from CPAN or sourceforge:
Data::StagThis perl module is for querying and manipulating complex data as recursively nested tag/value pairs (Structured tags or Simple Tree aggreggates). Procedural and object-oriented modes are supported. Tags can be accessed by autogenerated accessor methods. XML is a hierarchical data format, so this module can be used as an XML parser/writer. Other hierarchical formats are supported, including lisp S-Expressions (i.e. SXML) and indented-text. Construction of parsers, transformers and writers is simplified with structured tag events, similar to and compatible with SAX. As well as being a useful module for perl developers, this module also comes with a number of useful scripts for manipulating stag data. At this time there is only a perl implementation, Data::Stag, but C and Lisp implementations are planned. DBIx::DBStagThis module is for conversion between relational representations and hierarchical tag-value pairs, i.e. Stag trees, or XML. Querying: SQL query results are automatically decomposed into the relations used in the query, and a hierarchical structure is inferred. This allows you to go from multi-table joins to deeply nested hierarchical representations that capture the foreign key data in the database. This modules also allows you to create SQL templates - a powerful way of reusing complex SQL statements. Storage: Stag trees can be stored in a relational database with a minimum of metadata. There are also scripts to help with construction of ad-hoc normalised relational databases from XML sources. |
| Data::Stag and DBIx::DBStag | Perl module documentation on CPAN |
| Script Docs | Stag script documentation (these scripts come with the Stag and DBStag distributions) |
| UBIQ Query Interface | A demo of DBStag for mapping query results to hierarchical tag-value data. This interface provides WWW access to a number of bioinformatics databases (Gene Ontology, Ensembl, Chado, BioSQL, GadFly). Templates can be selected, or you can feed in your own SQL. |
| Stag project page on Sourceforge | Here you can find the Stag CVS repository, mail lists, etc |
| DBStag Tutorial | Brief tutorial on basic DBStag usage for biological databases. (slightly out of date - some aspects of DBStag may have changed) |
| DBIx::DBStag::Cookbook | DBStag cookbook - shows how to generate a normalised relational db from an XML source (the CIA world factbook), create your own SQL templates and build a WWW query interface |
| DBIx::DBStag::SQLTemplate | The POD manpage describing SQL templates - a powerful way of reusing complex SQL statements |
| Stag Poster | DBStag poster from Genome Informatics 2003 at Cold Spring Harbor Laboratory (large image) |
| Example Stag Templates | Some example Stag SQL templates for the Gene Ontology Database |