Standard Library (5 of 5). LibrettoDB and Databases

Relational databases are interpreted in Libretto as object models, and queries to databases are interpreted as Libretto expressions. The access to a database is organized in two steps:

1. The development of an object model for the database universe of discourse.
2. The construction of mapping from this object model to the database.

The technology implemented in Libretto has a theoretical background published in Databases as Ontologies. Due to this method, queries to a database can be represented as regular Libretto expressions.

Standard Library (4 of 5). XML and HTML Processing

In this post I show how Libretto handles XML and HTML documents – on both the server and client sides.

Standard Library (3 of 5). Metaprogramming

Metaprogramming allows the programmer to manipulate basic Libretto entities (packages, classes, functions and fields) as mutable data structures. The tools, which are outlined in this section, can affect the basic object model of the program. Since they are powerful and brutal, it is recommended to use them with great caution and only when necessary.

Standard Library (2 of 5). Multitasking

Multitasking is implemented in the Libretto standard library. The basic components of concurrent computing in Libretto are the actor model and software transactional memory based on the optimistic approach.

Standard Library (1 of 5). Basic Datatypes

In this post I overview Libretto basic datatypes.

Computing in Libretto (5 of 5). Comments

There are two types of comments in Libretto: doc comments and code comments.

Computing in Libretto (4 of 5). Exception Handling

Exceptions and their handling in Libretto are considered here. Please pay your attention to local traps.