Help:Page names
- Terms
The terms "full page name" and "full pagename" include the namespace prefix; the terms "page name" and "pagename" are somewhat ambiguous for pages outside the main namespace as they may or may not include the namespace prefix. To avoid ambiguity one can use "full pagename" and "pagename without namespace prefix".
Restrictions
- Special characters
- The following characters are not allowed in page titles # < > [ ] | { }
- The non-printable characters with values 0 through 31, and the "delete" character 127, are also not allowed.
- The + character is also not allowed in page titles.
- Maximum page name length
- The maximum page name length is 255 bytes (excluding the namespace prefix). Be aware that non-ASCII characters may take up to four bytes in UTF-8 encoding, so the total number of characters you can fit into a title may be less than 255 depending on the language it's in.
Spaces vs. underscores
In page names, a blank space is equivalent with an underscore. A blank space is displayed in the large font title at the top of the page, the URLs show an underscore.
Case-sensitivity
If for the first letter of a page name two cases exist, as in the case of letters of the Latin, Greek, Cyrillic, and Armenian alphabets, the following applies.
All characters of namespace prefixes are case-insensitive. The canonical form, shown in large font as page header.
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