Bom & dom

Bom origin:

To use computers to assist enterprise production management, computers should first be able to read the product components and all materials to be involved in the enterprise. In order to facilitate computer identification, the product structure expressed in diagrams must be converted into a data format. The document describing the product structure in the data format is the material list, that is, Bo

M. It is a technical document defining the product structure. Therefore, it is also called a product structure table or product structure tree. In some industrial fields, it may be called "formula", "element [1] Table", or other names.

Function of BOM:

Bom is the most important basic data in PDM, mrpⅱ, and ERP information systems. Its organizational format design directly affects the processing performance of the system. Therefore, based on the actual use environment, it is very important to flexibly design a reasonable and effective Bom. Bom is not only an important input data in the mrp ii system, but also an important basis for the Financial Department to calculate costs and the manufacturing department to organize production. Therefore, BOM has the largest impact, it has the highest accuracy requirement. Correct Use and Maintenance of BOM is an important task during the operation of the management system. In addition, Bom is an important interface between CIMS/MIS/MRP ⅱ/ERP and subsystems such as CAD and CAPP, and is the key to system integration. Therefore, when BOM management is implemented by a computer, information exchange with other subsystems should be fully considered. Purpose 1: It is the basis for computer identification of materials. 2. It is the basis for preparing the plan. 3. It is the basis for supporting and collecting materials. 4. Track the processing process based on it. 5. It is the basis for procurement and outsourcing. 6. Calculate the cost based on it. 7. The quotation can be used as a reference. 8. Perform material tracing. 9. serialization, standardization, and generalization of the design. Bom format: 1. bom4. origin of virtual bom dom: Document Object Model (DOM) is a standard programming interface recommended by W3C for processing Extensible Markup Language. On a webpage, objects on an organizational page (or document) are organized in a tree structure. The standard model used to represent objects in a document is called Dom. The history of the Document Object Model can be traced back to the "browser war" between Microsoft and Netscape in the late 1990 s. The two sides decided to survive and survive JavaScript and JScript, so they granted powerful functions to the browser on a large scale. Microsoft has added a lot of exclusive things in Webpage technology, including VBScript, ActiveX, and Microsoft's own DHTML format, so that many webpages cannot be displayed normally on non-Microsoft platforms and browsers. Dom is a masterpiece developed at that time. Background: dom = Document Object Model, Document Object Model. Dom can be used to access and modify the content and structure of a document in a way independent of platform and language. In other words, this is a common way to represent and process an HTML or XML document. One thing It is important that Dom is designed based on the specification of Object Management Organization (OMG) and can be used in any programming language. At first people thought of it as a method that allowed JavaScript to be transplanted between browsers, but Dom applications are far beyond this scope. DOM technology allows users to dynamically change pages, such as dynamically displaying or hiding an element, changing their attributes, and adding an element. DOM technology greatly enhances page interaction.  Dom classification: Level 1 dom1 Dom became W3C proposal in October 1998, which consists of two modules: Dom core and Dom HTML. The Dom core can map the XML-based document structure, allowing you to obtain and operate any part of the document. Dom HTML extends the DOM core by adding HTML-specific objects and functions. Level 2 Domdom given that level 1 Dom only targets the ing document structure, level 2 Dom is more oriented. Through the extension of the original Dom, level 2 Dom adds mouse and user interface events through the object interface (DHTML supports mouse and user interface events for a long time) range, traversal (repeatedly executing Dom documents), and Cascading Style Sheets (CSS. The core of Dom 1 is also extended to support XML Namespaces. Level 3 dom3 dom further expands DOM by introducing a unified method of loading and saving documents and document verification methods. dom3 contains a new module named "dom loading and saving, dom core Extensions support all content of xml1.0, including XML infoset, XPath, and XML base.

Bom & dom