Various studies of internet scenarios and usability have determined that the interface of Web applications must also support users in their work. Consistency in the texts on the user interface is an important part of how users perceive our software. This applies not only to terminology, but also to writing style, to ensure that SAP's software has a professional appearance and a consistent look and feel. Users should not notice whether the texts they see are the original language of the interface or a translation, and should see no difference in style regardless of whether the texts were written in Germany, the United States, India, or wherever.
While capitalization is not something that end users pay much attention to, consistency of capitalization not only improves the look and feel of the software but also can help to save costs considerably. English, for example, is the source language for 10 other languages at SAP. If the same text is written in two different ways, even if the difference is only in capitalization or punctuation, it becomes two distinct texts for the languages that translate from English. This slows down translation and increases the risk of inconsistent terminology in those languages, which can confuse the end users.
If you write system texts in English - regardless of whether you are a developer, technical author, or translator - you can help to ensure a consistent interface and keep costs down by adhering to the capitalization guidelines below.
The English language generally distinguishes between two styles of capitalization - title case and sentence style. (Title case is also often referred to as "initial caps", "init caps", or "headline style".)
Title case means that the first letter of each word is capitalized, except for certain small words, such as articles and short prepositions. For more detailed information about what is meant by title case, see the Quick Guide to Capitalization in English at SAP below.
Use title case for the following screen elements:
In sentence style, only the first letter of the sentence or phrase is capitalized. All words after that are written in lower case, except for proper nouns.
Use sentence style for the following texts:
These standards apply to all cases, in all documentation, where "initial caps" are to be used ("headline style") as opposed to sentence style (first word of sentence or phrase capitalized only), regardless of the specific type of title, heading, header, or interface text.
Do Not Capitalize
2 This rule differs slightly to the CMS rule but is more appropriate for our documentation and user interfaces.
Source: SAP Reference Lists