The key technology of digital workflow-JDF

Editor's note: "Do you know JDF? Do you know the growth process of JDF? Do you know the definition, function, superiority, goal, importance and other characteristics of JDF? JDF can communicate the information between business and production well. The entire printing process from business to production can also be comprehensively controlled.

Definition of JDF

JDF (Job Definition Format) is a job description format, which is an open file format based on XML (Extensible Markup Language) for job description and exchange. That is to say, the printing task can be regarded as a job that goes through many production processes, and JDF provides a format for describing such jobs according to the production process. This format allows users to clarify the necessary control in each process, guide the production device to execute the production process, and can be used for the exchange between the pre-business management and the post-production execution.

The following is a further description of JDF, making it easier for us to understand the meaning of JDF:

JDF is a description of a data exchange format, not an application or a system;

JDF is encoded by XML, it is extensible;

JDF is a PPF (printing production format) and Adobe's PJTF (portable label format) established in CIP3 (Inter-national Cooperation for the Integration of Prepress, Press and Postpress International Standard Organization for Prepress, Printing, and Postpress Integrated Manufacturing). Above the structure described;

JDF is modeled on the synthesis of product nodes, processing nodes and production resources;

The JDF job description and JMF (Job Message Format) messages together define the structure of JDF.

Features of JDF

Based on the above purpose, JDF is both a format and a standard, and can achieve the following functions:

1. It covers all aspects of the printing workflow and effectively controls it to achieve uniformity in the standardization of transmission formats.

2. It bridges the gap between production and processing services and management information services (MIS). This function enables timely tracking of printing jobs and equipment, as well as pre-press and post-press data, making it possible to calculate in advance and afterwards.

3. Establish a communication by defining two work processes that are related to the product requirements and not related, so that the user's information on the product requirements and the production process information are connected to each other.

4. You can define and track any user-defined process, combining separate work processes including media, design, printing, network and e-commerce companies, without having to be limited to a fixed process model.

5. JDF can integrate products from different merchants into one workflow.

Advantages of JDF

JDF is not only a comprehensive solution with extremely high flexibility. No matter how many devices are needed for a printing job or how complex the printing job is, JDF can establish an effective communication channel between all links in the printing process. From the time the customer places the order until the final product is delivered to the customer, JDF can connect the management information system in the printing process with the actual production process.

In the printing field, there have been some standards in the past, PPF, PDF, PJTF, etc., and JDF is based on these technologies. It integrates these technologies and other standards together to become a more effective and powerful standard. This quickly made JDF a formal standard and recommended as an industry standard.

In addition, no other format can cover all aspects of the printing industry, from business management to production management to resource management, and the entire process before, during and after printing, and JDF can do it. [next]

The goal of JDF

The goal of JDF is to achieve the following three points:

1. Realize the description and exchange of printed jobs in different parts of the process and at different stages of information.

2. Create a digital "living package".

3. Describe printing jobs in all existing states.

It can be seen from the figure below that JDF can effectively communicate the existing various workflows and allow parallel work. It provides a detailed description of printed jobs at both the production level and the customer level. It makes full use of existing technology and acts as a lever between existing standards. And because of adopting XML language, carry on the object-oriented design, it is simple to carry out.

The importance of JDF

1. JDF is compatible with various formats: JDF and PPF (print production format) and Adobe's PJTF (portable label format) are compatible with each other. At the same time, JDF can also support IfraTrack's job tracking function.

2. JDF is suitable for different solutions: JDF has a powerful tree-shaped information structure, and the encoding method is based on XML, which provides a guarantee for the flexibility of JDF.

3. JDF is extensible: JDF inherits the characteristics of the XML language and has strong extensibility.

4. JDF supports various systems: JDF supports continuous production control, can distribute and combine orders, and promote automated workflow from multiple links, including effective cooperation between printing manufacturers and pre-press equipment suppliers.

5. JDF can improve the transparency of production: JDF can let you understand the various materials used and the amount used in each different production link. JDF supports dynamic data exchange, including related equipment information, job progress and job waiting management information.

6. JDF supports printing quotations and orders: allows print buyers to make requests to the printing house through a web dialogue, and customers can also make vague requests related to specific products.

7. JDF is a widely used industry standard: applicable to any printing manufacturer, which allows all manufacturers, distributors and printing plants to develop and use JDF-based workflow systems.

A simple JDF workflow

Let's take a closer look at how JDF works through a simple JDF workflow. This simple workflow consists of the following steps:

1. The customer creates a JDF description file about the product and transmission requirements.

2. Customers negotiate contracts with printers, and printers can use an integrated manufacturing system (MIS) to do this.

3. The printing machine uses an integrated manufacturing system (MIS) to describe the production process.

4. The job starts to execute, and the timely process information will be transferred to the integrated manufacturing system (MIS) from the JDF file that was activated by the program.

5. The collected data will be used for evaluation and budgeting.

6. The job is archived so that it can be recalled again.

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