LIBPA The library of practical abstractions (LIBPA) provides efficient implementations of conceptually simple abstractions, in the C programming language. We believe that the best library code is conceptually simple so that it will be easily understood by the application programmer; parameterized by type so that it enjoys wide applicability; and at least as efficient as a straightforward special-purpose implementation. It consists of modules for portable memory management, one dimensional arrays of arbitrary types, compact symbol tables, hash tables for arbitrary types, a trie module for length-delimited strings over arbitrary alphabets, single precision floating point numbers with extended exponents, and logarithmic representations of probability values using either fixed or floating point numbers. We have used LIBPA to implement a wide range of statistical models for both continuous and discrete domains. The time and space efficiency of LIBPA has allowed us to build larger statistical models than previously reported, and to investigate more computationally-intensive techniques than previously possible.

Current Version:   1.2 License Type:   Free for Non-Profit Use

Home Site: http://www.cs.princeton.edu/~ristad/papers/libpa.html Source Code Availability:   Yes Available Binary Packages: Debian Package:   No RedHat RPM Package:   No Other Packages:   No Targeted Platforms: i586/Linux, Alpha/OSF, and Sparc/Solaris Software/Hardware Requirements: None

Other Links: ftp://ftp.cs.princeton.edu/pub/packages/libpa/ (FTP site) Mailing Lists/USENET News Groups: None User Comments: None See A Screen Shot? (Not Yet)

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