A tag library, in Dreamweaver, is a collection of tags of a particular type, along with information about how Dreamweaver should format the tags. Tag libraries provide the information about tags that Dreamweaver uses for code hints, target browser checks, the Tag Chooser, and other coding capabilities. Using the Tag Library editor, you can add and delete tag libraries, tags, attributes, and attribute values; set properties for a tag library, including format (for easy identification in the code); and edit tags and attributes.
You can use the Tag Library editor to add tag libraries, tags, and attributes to the tag libraries in Dreamweaver.
Use the Tag Library editor to set properties for a tag library and edit tags and attributes in a library.
In the Tag Library editor (Tools > Tag Libraries), select a tag library (not a tag) in the Tags list.
The properties for tag libraries appear only when a tag library is selected. Tag libraries are represented by the top-level folders in the Tags list; for example, the HTML Tags folder represents a tag library, while the abbr folder within the HTML Tags folder represents a tag.
Specifies how Dreamweaver inserts the contents of a tag; that is, if it applies line break, formatting, and indentation rules to the content.
Specifies the case for a specific tag. Select from Default, Lowercase, Uppercase, or Mixed Case. If you select Mixed Case, the Tag Name Mixed Case dialog box appears. Type the tag with the case Dreamweaver should use when inserting it (for example, getProperty) and click OK.
Sets the default case for all tags. In the Default Tag Case dialog box that appears, select <UPPERCASE> or <lowercase>, and click OK.
You might want to set your default case to be lowercase to comply with XML and XHTML standards.