Where to look if the Splunk Style Guide doesn't answer your question

Explore additional resources for grammar, style, and content design if the Splunk Style Guide can't answer your question.

The Splunk Style Guide covers issues specific to Splunk documentation, but standards for grammar, spelling, style, and content design are extensively covered in a number of other references.

If you can't find what you're looking for in the Splunk Style Guide, refer to these reference materials:
Writing standardResource
Best practices for product and user interface text(Internal) Magnetic Design System

https://magnetic.cisco.com/0a43ab5cd/p/583e31-content-design

Grammar and punctuation for nontechnical terms The Chicago Manual of Style

http://www.chicagomanualofstyle.org/home.html

Spelling, definitions, and capitalization Merriam-Webster Dictionary

http://www.merriam-webster.com

Other technical documentation style issues

Writing references

The following references can enhance your writing and understanding of best practices in a variety of technical communications:
ReferenceWhat's good about it
Every Page is Page One by Mark Baker and the Every Page is Page One websiteThis book and accompanying website provides guidelines for technical writers to create standalone, user-centric documentation that doesn't rely on a traditional hierarchical structure.
Writing Is Designing: Words and the User Experience by Michael J. Metts and Andy WelfleThis book and workshop series offers suggestions for collaboration between writers and designers in an effort to create user-centered experiences when designing digital products.