Upper gastrointestinal series (or study), whereas the barium enema is called a lower gastrointestinal series (or study). In upper gastrointestinal series examinations, the barium sulfate is mixed with water and swallowed orally, whereas in the lower gastrointestinal series (barium enema), the barium contrast agent is administered as an enema through a small tube inserted into the rectum. Barium X-ray examinations are useful tools for the study of appearance and function of the parts of the gastrointestinal tract. They are used to diagnose and monitor esophageal reflux, dysphagia, hiatus hernia, strictures, diverticula, pyloric stenosis, gastritis, enteritis, volvulus, varices, ulcers, tumors, and gastrointestinal dysmotility, as
Colon (punctuation) languages like Haskell use a double colon (::) to indicate type instead. A colon is also sometimes used to indicate a tensor contraction involving two indices, and a double colon (::) for a contraction over four indices. Additional colon-related symbols for math are encoding in Unicode: In computing, the colon character is represented by ASCII code 58, (HTML :) and Unicode . Several compatibility forms for Chinese and Japanese typography are also encoded: In Hebrew: In the Budu language of the Democratic Republic of the Congo: In Microsoft Windows filenames, the colon is reserved for use in alternate data streams.