This page gives an overview of the main features of the JSDAI toolkit and applications.
JSDAI conforms to the following international standards:
- ISO 10303-11, EXPRESS
- ISO 10303-14, EXPRESS-X (draft)
- ISO 10303-21, STEP File (all editions and features)
- ISO 10303-22, Standard Data Access Interface SDAI
- ISO 10303-27, Java binding to the SDAI
- ISO 10303-28, STEP XML
- ISO 10303-35, SDAI conformance test
Application Programming Interfaces (API)
JSDAI supports in parallel four different APIs which are tightly related with each other:
- Early binding: For each EXPRESS entity a dedicated Java class and interface with dedicated access methods for each entity attribute is available.
- SDAI dictionary: An API on meta level to query schema/data model information at runtime.
- Late binding: Generic Java classes for every kind of EXPRESS entity and methods to access attribute values.
- ARM-AIM mapping: Operations to switch between ARM and AIM data models (STEP specific).
Data storage and exchange
STEP application data can be stored and exchanged in a various of ways:
- STEP File, ISO 10303-21
- STEP XML, ISO 10303-28
- SDAI File
- Local repositories
- Multi-user remote repositories via JSDAI Database
Data handling and transaction control
As a fully conformant application JSDAI takes full advantage of the SDAI concepts to organize and control application data with essential extensions:
- Separation of physical (SdaiRepository) and logical grouping (Schema Instance) of application instances.
- Workspace concept (SchemaInstance + SdaiModel) to control access rights and logical grouping of data.
- Direct support of distributed data between several repositories for reuse in several workspaces.
- Explicit support of AP-Interoperability (between different schemas) by using EXPRESS short forms.
- Full transaction support controled by commit and abort operations.
- For multi-user support SDAI transactions are mapped to DB transactions.
The JSDAI Express Compiler makes any valid EXPRESS schema (ISO 10303-11) available for the JSDAI Runtime:
- Parses EXPRESS and reports syntax errors;
- Generates Java classes, interfaces and dictionary data for JSDAI Runtime;
- Supports expressions used in procedures, functions, derived attributes and where rules;
- Direct support of the original EXPRESS short forms (USE/REFERENCE FROM). No need to rely on the derived long forms;
- Used to build the JSDAI Library;
- ExpressDoc tool to generate HTML documentation for one or several related Express schemas.
Includes practically all relevant Express schemas from STEP and PLIB standards.
- Includes more than 100 EXPRESS schemas;
- AIM schemas are based on EXPRESS short forms;
- Includes ARM and extended ARM schemas for direct implementation;
- HTML documentation with index accross all AIM types.
As true Java toolkit and applications, JSDAI is able to run on any Java platform supporting:
- Java Runtime Environment (JRE) 1.4.
- older versions of JSDAI are available for JRE 1.2 and 1.3.
- Java 3D for JSDAI 3D viewer.
SdaiEdit and SdaiTerm
Low level tools to edit, and debug application data:
- SdaiTerm running in a terminal mode.
- SdaiEdit, a GUI enabled editor to view and manipulate data.