Eclipse UI specification (in upper case)

Capitalization
(Uppercase)
Guideline 1.5

Use headline style capitalization for menus, tooltip
And all titles, including those used for Windows, dialogs, tabs, column
Headings and push buttons. capitalize the first and last words, and all
Nouns, pronouns, adjectives, verbs and adverbs. do not include
Ending punctuation.
In the following cases, use the uppercase title style, menus, tooltip and all titles, including those used
Windows, dialogs, tabs, column headings and push buttons. capitalize
The first and last words, and all nouns, pronouns, adjectives, verbs
And adverbs.
Do not add punctuation at the end (also Chinese)

Guideline 1.6

Use Sentence Style capitalization for all control
Labels in a dialog or window, including those for check boxes, Radio
Buttons, group labels, and simple text fields. capitalize
First letter of the first word, and any proper names such as the word
Java.