A transclusion allows to include the content of other zettel into the current zettel.

The transclusion specification begins with three consecutive left curly bracket characters (“`{`”, U+007B) at the first position of a line and ends with three consecutive right curly bracket characters (“`}`”, U+007D).
The curly brackets delimit either a [zettel identifier](00001006050000) or a searched zettel list.
You can add some [attributes](00001007050000), although a transclusion does not support the default attribute.
Any other characters in this line will be ignored.

This leads to three variants of transclusions:

1. Transclusion of the content of another zettel into the current zettel.
   This is done if you specify a zettel identifier, and is called *zettel transclusion*.
1. Transclusion of the list of zettel references that satisfy a [query expression](00001007700000).
   This is called *query transclusion*.
1. Transclusion of the content of an image, referenced by a [hosted or based](00001007040310#link-specifications) link / URL.

The first two variants are described on separate zettel:

* [Zettel transclusion](00001007031110)
* [Query transclusion](00001007031140)