Home
Design concepts
Learn about HCL Link services, projects, flows, maps and schemas.
Schemas
Schemas specify the format of data witin HCL Link maps and flows.
Schemas
Use the schema designer to define, modify, and view schemas. A schema describes the syntax, structure, and semantics of your data.
Type properties
XML properties in the schema
Element type declarations

Design concepts
Learn about HCL Link services, projects, flows, maps and schemas.
- Introduction
  The documentation provided here defiens the main artifacts in HCL Link. It is necessar to understand what these artifacts are and the relationship between them.
- Services
  Service definitions define REST services and the endpoints of a service.
- Projects
  A project is a container for HCL Link artifacts.
- Flows
  A HCL Link flow is a transactional data flow comprised of processing nodes.
- Maps
  A HCL Link map defines how to generate data that complies to a specific schema. A map can have any number of inputs and outputs.
- Schemas
  Schemas specify the format of data witin HCL Link maps and flows.
  - Schemas
    Use the schema designer to define, modify, and view schemas. A schema describes the syntax, structure, and semantics of your data.
    - About schemas
      A schema defines the contents of at least one input that you intend to map or one output you intend to map.
    - Subtypes
    - Schema hierarchy
    - Defining data
    - Objects, types, and classes
    - Testing part of a schema
      You can test a schema by generating test data for an item or a group. The schema designer creates source and compiled maps that generate and validate the test data. The test-data-generation map automatically runs and produces a text file with the sample data. After that, the test-data-validation map automatically runs on the sample data file.
    - Type properties
    - Item restrictions
    - Components
    - Partitioning
    - Type inheritance
    - Error detection
    - Error recovery
    - Schema analyzer
    - Distinguishable objects
    - Return codes and error messages
- Connections and Actions
  This documentation describes connections and actions.
- Files
  Files are used in various places within HCL Link. HCL Link allows files to be uploaded to the HCL Linkserver.
- Flow variables
  Flow variables provide a means of passing information throughout a flow instance without requiring that the information to be passed through data links. flow variables are name-value pairs that persist, unless deleted.
- Cache variables
  Cache variables provide a means of processing information throughout a flow instance without requiring that the information to be passed through data links.

Element type declarations

The XML DTD and XML Schema importers can generate a simple schema when encountering character content within mixed data. During the import process, when character data (CDATA/PCDATA) is encountered, the importer incorporates it into existing text items within the schema.