An inline-zettel block allows to specify some content with another syntax without creating a new zettel.
This is useful, for example, if you want to embed some [[Markdown|00001008010500]] content, because you are too lazy to translate Markdown into Zettelmarkup.
Another example is to specify HTML code to use it for some kind of web front-end framework.

As all other [[line-range blocks|00001007030000#line-range-blocks]], an inline-zettel block begins with at least three identical characters, starting at the first position of a line.
For inline-zettel blocks, the at-sign character (""''@''"", U+0040) is used.

You can add some [[attributes|00001007050000]] on the beginning line of a verbatim block, following the initiating characters.
The inline-zettel block uses the attribute key ""syntax"" to specify the [[syntax|00001008000000]] of the inline-zettel.
Alternatively, you can use the generic attribute to specify the syntax value.
If no value is provided, ""[[text|00001008000000#text]]"" is assumed.

Any other character in this first line will be ignored.

Text following the beginning line will not be interpreted, until a line begins with at least the same number of the same at-sign characters given at the beginning line.
This allows to enter some at-sign characters in the text that should not be interpreted at this level.

Some examples:
```{="zmk"}
@@@markdown
A link to [this](00001007031200) zettel.
@@@
```
will be rendered as:
:::{="example"}
A link to [[this|00001007031200]] zettel.
:::
If you have set [[''insecure-html''|00001004010000#insecure-html]] to the value ""zettelmarkup"", the following markup is not ignored:
```{="zmk"}
@@@html
<h1>H1 Heading</h1>
Alea iacta est
@@@
```
will render a section heading of level 1, which is not allowed within Zettelmarkup:
:::{="example"}
@@@{="html"}
<h1>H1 Heading</h1>
Alea iacta est
@@@
:::
:::{="note"}
Please note: some HTML code will not be fully rendered because of possible security implications.
This include HTML lines that contain a ''<script>'' tag or an ''<iframe>'' tag.
:::
Of course, you do not need to switch the syntax and you are allowed to nest inline-zettel blocks:
```{="zmk"}
@@@@zmk
1st level inline
@@@zmk
2nd level inline

Transclusion of zettel to enable authentication:
{{{00001010040100}}}
@@@
@@@@
```
will result in the following HTML output:
:::{="example"}
1st level inline

2nd level inline

Transclusion of zettel to enable authentication:

To enable authentication, you must create a zettel that stores [[authentication data|00001010040200]] for the owner.
Then you must reference this zettel within the [[startup configuration|00001004010000#owner]] under the key ''owner''.
Once the startup configuration contains a valid [[zettel identifier|00001006050000]] under that key, authentication is enabled.

Please note that you must also set key ''secret'' of the [[startup configuration|00001004010000#secret]] to some random string data (minimum length is 16 bytes) to secure the data exchanged with a client system.
:::