Free data abstraction software for linux

The CAN Abstraction Layer (CANAL) provides a single interface for programs to use different CAN drivers.
It consists of a CANAL daemon that handles client and driver communication, a canalLogger that logs messages in a window, and a simple diagnostic application. C++ clases and DLL/DL interfaces are provided.
Enhancements:
- The configuration readings for CanalWorks were upgraded.
- A GUID ordering problem in canald was fixed.
- A problem with clear message list switch in CanalWorks was fixed.
- A problem in which Linux version Level I received a thread with an invalid count returned for DataAvailable was fixed.

Database Independent Abstraction Layer for C (libdbi) implements a database-independent abstraction layer in C, similar to the DBI/DBD layer in Perl.
Writing one generic set of code, programmers can leverage the power of multiple databases and multiple simultaneous database connections by using this framework.
Main features:
Database-level abstraction:
Your programs dont need to deal with the arbitrary interfaces and oddities of each database library. libdbi handles all the details for you, you just tell it what you want the database to do.
Modularity:
Since database code written with libdbi is not tied to one specific database server, you can effortlessly switch databases or give your users the option to specify their own database settings.
Clean interface:
With ample documentation describing libdbi and its well thought out object-oriented design, programming with libdbi should be less painful than programming with native database libraries. And you only need to learn it once instead of learning each database librarys syntax.
Accommodates coder apathy:
libdbi is written to do The Right Thing(tm), not just some quick hack that does the job in a half-assed fashion. This saves tons of your $100/hour time from debugging, so that you can mess around having fun during the hours that clients are paying you to debug. It also strives to reduce the worldwide crisis of carpal tunnel syndrome, so it uses constructs such as this one to pack multiple function calls into one line, saving you the bother of typing more than you have to:
dbi_result_get_fields(result, "id.%i firstname.%s lastname.%s fractional_value.%f", &id, &firstname, &lastname, &floatval);
Driver interface:
The dynamic linking used by libdbi allows for driver authors to license their drivers however they please - they are not restricted to the GPL or LGPL. Drivers are easy to write, and require no special installation.
Error handling:
Instead of checking every single database call for errors, libdbi gives programmers the option of registering an error handler callback, similar to a signal handler. Because we know youll "forget" to check for errors otherwise :)
Convenience:
Spend your time writing clever code, not reinventing the wheel with your own single-use, #define-abusing, less featureful database interface.
libdbi implements a database-independent abstraction layer in C, similar to the DBI/DBD layer in Perl. Writing one generic set of code, programmers can leverage the power of multiple databases and multiple simultaneous database connections by using this framework.
The libdbi-drivers project maintains drivers for libdbi. Drivers are distributed seperately from the library itself.
There are currently drivers for MySQL, PostgreSQL, SQLite, and mSQL. More are on the way.
Enhancements:
- Support for a timezone suffix in time and date types was added.
- Error handling and error reporting were vastly improved.
- Some memory leaks were fixed.

Data::FormValidator::Constraints is a Perl module with basic sets of constraints on input profile.

SYNOPSIS

use Data::FormValidator::Constraints qw(:all);
In an Data::FormValidator profile:
constraint_methods => {
email => email(),
fax => american_phone(),
phone => american_phone(),
state => state(),
},

These are the builtin constraints that can be specified by name in the input profiles.
Be sure to check out the SEE ALSO section for even more pre-packaged constraints you can use.

DOG Data Organizer provides a bookmark organizer for various bookmark types.

DOG is a personal knowledge manager based on topic maps. It currently specializes in managing bookmarks.

It imports and exports Netscape, Mozilla, and KDE2 (XBEL) bookmark files, and it imports KDE1 bookmarks and Windows IE Favorites.

Haskell Database Connectivity project provides an abstraction layer between Haskell programs and SQL relational databases. This lets you write database code once, in Haskell, and have it work with any number of backend SQL databases (MySQL, Oracle, PostgreSQL, ODBC-compliant databases, etc.)
HDBC is modeled loosely on Perls DBI interface http://search.cpan.org/~timb/DBI/DBI.pm, though it has also been influenced by Pythons DB-API v2, JDBC in Java, and HSQL in Haskell.
HDBC is a from-scratch effort. It is not a reimplementation of HSQL, though its purpose is the same.
Main features:
- Ability to use replacable parameters to let one query be executed multiple times (eliminates the need for an escape function)
- Ability to access returned rows by column number
- Ability to read data from the SQL server on-demand rather than reading the entire result set up front
- HUnit testsuite for each backend driver
- Well-defined standard API and easy backend driver implementation
- Lazy reading of the entire result set (think hGetContents, but for the results of SELECT) (see sFetchAllRows)
- Support for translation between Haskell and SQL types
- Support for querying database server properties
- Add-on package (hdbc-missingh) to integrate with MissingH, providing a database backend for AnyDBM.
- Support for querying metadata such as column names.
- Support for querying additional metadata (column types, etc.)

Common Data Format is a self-describing data abstraction for the storage and manipulation of multidimensional data in a platform- and discipline-independent fashion.
It consists of a scientific data management package (known as the "CDF Library") that allows programmers and application developers to manage and manipulate scalar, vector, and multi-dimensional data arrays.
Enhancements:
- Adds new sets of APIs to allow Standard Interface to interact with zVariables and other CDF-related information.
- Adds MingW and FreeBSD ports.
- Adds support for Intel C++ and Fortran for Linux.
- Adds the ability to create legacy CDF 2.7 files.
- Fixes a bug that prevented directories from having .cdf or .skt extensions.

Test::Data is a Perl module to test functions for particular variable types.

SYNOPSIS

use Test::Data qw(Scalar Array Hash Function);

Test::Data provides utility functions to check properties and values of data and variables.

Functions

Plug-in modules define functions for each data type. See the appropriate module.

How it works

The Test::Data module simply emports functions from Test::Data::* modules. Each module defines a self-contained function, and puts that function name into @EXPORT. Test::Data defines its own import function, but that does not matter to the plug-in modules.

If you want to write a plug-in module, follow the example of one that already exists. Name the module Test::Data::Foo, where you replace Foo with the right name. Test::Data should automatically find it.

Valentina is cross-platform DBMS that makes it easy to switch between a local embedded database and server using the same sources. It supports disk and in-memory databases, field types from Bit to BLOB, and both a SQL92(99) and non-SQL API.
Valentina supports Relational, Extended Navigational, and Object-Relational data models. It introduces a revolutionary model abstraction "Link". It works natively in UTF-16, can accept 270 encodings, and features advanced features such as regular expressions, XML, full-text search, pictures, functions, and calculated fields. It offers triggers, views, and stored procedures.
Enhancements:
- Valentina Studio now has a Diagrams panel for database schema.
- There are new examples on the usage of Link refactorings API and SQL commands.
- There are about 40 bugfixes over the entire product line (kernel, PHP, REALbasic, Director, VCOM, and VStudio).