| ## Text Encoding Initiative
### The XML Version of the TEI Guidelines # %om.RR

`om.RR` | (omissibility indicator (SGML version)) Used in the declaration of an SGML element to indicate that neither the end-tag nor the start-tag may be omitted.
Note | This parameter entity is redefined as a null string when an XML DTD is requested.
Declaration | `<!ENTITY % om.RR '- -' >`
See further | 3.8.4 Generation of an XML DTD

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