.CDM 文件扩展名
Conceptual Data Model
| 开发者 | SAP |
| 受欢迎程度 |
2.0 | 1 票 |
A CDM file is a data model created by SAP PowerDesigner, an enterprise modeling and design program. It stores a data model diagram that includes data items, entities, relationships, association links, notes, and shapes. CDM files also store metadata, such as the creator, creation date, and modification dates of the model.
更多信息
The purpose of the Conceptual Data Model (CDM) format is to store the conceptual structure of an information system. CDM files are a more abstract version of a Logical Data Model (LDM file) or Physical Data Model (.PDM file).
To create a CDM file with Power Designer:
- Select .
- Click the "Information" category.
- Choose the "Conceptual Data" category item and click .
- Select .
如何打开 CDM 文件
You can open CDM files with SAP PowerDesigner in Windows. To open a CDM file with Power Designer, select .
可打开 CDM 文件的程序
dBASE Custom Data Module
| 开发者 | dBASE |
| 受欢迎程度 |
2.0 | 1 票 |
A CDM file is a custom data module created by dBASE, an IDE with database management capabilities. It contains data objects, including Database, Query, Session, and StoredProc objects, and their properties. dBase users create custom data modules to control the objects in inherited data modules (.DMD) files (e.g., you can set the properties for objects in a CDM file that objects in inherited DMD files will also inherit).
更多信息
dBASE is a Windows application with features for managing databases and building and compiling programs. One of dBASE's features is the ability to create a custom data module that you can use to create and control multiple other data module (DMD) files.
The custom data module feature allows you to modify one CDM file, and the multiple other DMD files based on that CDM file will also change accordingly. To create DMD files based on a CDM file, select , then choose .dmd from the dropdown menu.
如何打开 CDM 文件
You can open CDM files with dBASE in Windows. For example, you can open a CDM file by selecting .
Opening a CDM file with a text editor
Since CDM files contain plain text, you can also open the files with a text editor, such as Microsoft Notepad (Windows) or Apple TextEdit (Mac). You may need to rename the .cdm file extension to .txt for the text editor to recognize it.
When opened in a text editor, you can modify the source code in the data module. However, it will not appear the same as if you open the file with dBASE. Also, incorrectly editing the file will corrupt the data module.