# Yioop Wiki Syntax

Wiki syntax is a lightweight way to markup a text document so that it can be formatted and drawn nicely by Yioop. This page briefly describes the wiki syntax supported by Yioop.

In wiki syntax headings of documents and sections are written as follows:
= Level 1 =
== Level 2 ==
=== Level 3 ===
==== Level 4 ====
===== Level 5 =====
====== Level 6 ======

and would look like:

# Level 1

## Paragraphs

In Yioop two new lines indicates a new paragraph. You can control the indent of a paragraph by putting colons followed by a space in front of it:
: some indent

:: a little more

::: even more

:::: that's sorta crazy

which looks like:
some indent
a little more
even more
that's sorta crazy

## Horizontal Rule

Sometimes it is convenient to separate paragraphs or sections with a horizontal rule. This can be done by placing four hyphens on a line by themselves:
----

This results in a line that looks like:

## Text Formatting Within Paragraphs

Within a paragraph it is often convenient to make some text bold, italics, underlined, etc. Below is a quick summary of how to do this:

### Wiki Markup

 ''italic''  italic '''bold'''  bold '''''bold and italic'''''  bold and italic

### HTML Tags

Yioop also supports several html tags such as:
 delete  delete insert  insert strike through or strike through  strike through superscript and subscript  superscript and subscript typewriter  typewriter underline  underline

### Spacing within Paragraphs

The HTML entity
&nbsp;
can be used to create a non-breaking space. The tag
<br>
can be used to produce a line break.

## Preformatted Text and Unformatted Text

You can force text to be formatted as you typed it rather than using the layout mechanism of the browser using the
<pre>preformatted text tag.</pre>
Alternatively, a sequence of lines all beginning with a space character will also be treated as preformatted.
Wiki markup within pre tags is still parsed by Yioop. If you would like to add text that is not parsed, enclosed it in <mbox{nowiki}> </mbox{nowiki}> tags.

## Styling Text Paragraphs

Yioop wiki syntax offers a number of templates for control the styles, and alignment of text for a paragraph or group of paragraphs:
{{left| some text}},
{{right| some text}},
and
{{center| some text}}
can be used to left-justify, right-justify, and center a block of text. For example, the last command, would produce: {{center| some text }} If you know cascading style sheets (CSS), you can set a class or id selector for a block of text using:
{{class="my-class-selector" some text}}
and
{{id="my-id-selector" some text}}.
You can also apply inline styles to a block of text using the syntax:
{{style="inline styles" some text}}.
For example, {{style="color:red" some text}} looks like {{style="color:red" some text}}.

## Lists

The Yioop Wiki Syntax supported of ways of listing items: bulleted/unordered list, numbered/ordered lists, and definition lists. Below are some examples:

### Unordered Lists

* Item1
** SubItem 1
** SubItem 2
*** SubSubItem 1
* Item 2
* Item 3

would be drawn as:
• Item 1
• SubItem 1
• SubItem 2
• SubSubItem 1
• Item 2
• Item 3

### Ordered Lists

# Item 1
## SubItem 1
## SubItem 2
### SubSubItem 1
# Item 2
# Item 3

1. Item1
1. SubItem 1
2. SubItem 2
1. SubSubItem 1
2. Item 2
3. Item 3

### Mixed Lists

# Item1
#* SubItem 1
#* SubItem 2
#*# SubSubItem 1
# Item 2
# Item 3

1. Item1
• SubItem 1
• SubItem 2
1. SubSubItem 1
2. Item 2
3. Item 3

### Definition Lists

;Term 1: Definition of Term 1
;Term 2: Definition of Term 2

Term 1
Definition of Term 1
Term 2
Definition of Term 2

## Tables

A table begins with {| and ends with |}. Cells are separated with | and rows are separated with |- as can be seen in the following example:
{|
|a||b
|-
|c||d
|}

 a b c d
Headings for columns and rows can be made by using an exclamation point, !, rather than a vertical bar |. For example,
{|
!a!!b
|-
|c||d
|}

a b
c d
Captions can be added using the + symbol:
{|
|+ My Caption
!a!!b
|-
|c||d
|}

My Caption
a b
c d
Finally, you can put a CSS class or style attributes (or both) on the first line of the table to further control how it looks:
{| class="wikitable"
|+ My Caption
!a!!b
|-
|c||d
|}

My Caption
a b
c d
Within a cell attributes like align, valign, styles, and class can be used. For example,
{|
| style="text-align:right;"| a| b
|-
| lalala | lalala
|}

 a b lalala lalala

## Math

Math can be included into a wiki document by either using the math tag:
$\sum_{i=1}^{n} i = frac{(n+1)(n)}{2}$

 \sum_{i=1}^{n} i = frac{(n+1)(n)}{2}
or by enclosing the math in backticks:
[[1, -2],[3,4]]

[[1, -2],[3,4]].
Rendering of math is done using MathJax, making us of the ASCIImathml extensions.
A hypertext link to another document can be inserted into a wiki page using the chain link icon in the GUI. Alternatively, there are several techniques for inserting a link into a page depending on whether the link is to a page within the same wiki group, is a link to a page on a different wiki group, or is a link to a different website. In addition to normal hypertext links, Yioop also supports relationship links.
Intra-Group Wiki Links use the syntax:
[[name_of_wiki_page]]
or
or

for example, to make a link to this Syntax page one could write,
[[Syntax|Yioop Wiki Syntax Page]]

which would look like,
Inter-Group Wiki Links use the syntax:
[[name_of-group@name_of_wiki_page|text for the link]]

Different Website Links use the syntax:
[[website_url|text for the link]]

Relationships are a generalized form of link. They are used to express a more complicated linking between two wiki pages and have the syntax:
[[relationship_type|wiki_page_name|text for the link]]

In the navigation dropdown for a Yioop wiki page there are items for what links to the current page and what relates to the current page based on the links and relationships a page belongs to.
You can add a dropdown that can allow users to navigate to recently visited wiki pages using the syntax:
[{recent_places}]
This looks like:

## Adding Resources to a Page

Yioop wiki syntax supports adding search bars, audio, images, and video to a page. The magnifying class edit tool icon can be used to add a search bar via the GUI. This can also be added by hand with the syntax:
{{search:default|size:small|placeholder:Search Placeholder Text}}

This syntax is split into three parts each separated by a vertical bar |. The first part search:default means results from searches should come from the default search index. You can replace default with the timestamp of a specific index or mix if you do not want to use the default. The second group size:small indicates the size of the search bar to be drawn. Choices of size are small, medium, and large. Finally, placeholder:Search Placeholder Text indicates the grayed out background text in the search input before typing is done should read: Search Placeholder Text. Here is what the above code outputs:
{{search:default|size:small|placeholder:Search Placeholder Text}}
Image, video and other media resources can be associated with a page by dragging and dropping them in the edit textarea or by clicking on the link click to select link in the gray box below the textarea. This would add wiki code such as
((resource:myphoto.jpg|Resource Description))
to the page. Only saving the page will save this code and upload the resource to the server. In the above myphoto.jpg is the resource that will be inserted and Resource Description is the alternative text to use in case the viewing browser cannot display jpg files. To add a resource from a different wiki page belonging to the same group to the current wiki page one can use a syntax like:
((resource:Documentation:ConfigureScreenForm1.png|The work directory form))
Here Documentation would be the page and ConfigureScreenForm1.png the resource. You can also insert resources from a data-string using resource-data rather than resource . For example:
((resource-data:image/jpeg;base64,/9j/4AAQSkZJRg...rest of image data...|Seekquarry Logo))
could be used to inline an image like:
be aware though that the default maximum wiki page size is 512Kb (this can be set in src/configs/Config.php).
Sometimes it is useful to edit the basic resource link above to make a link which is a thumbnail of the resource which points to a separate page containing that resource. This can be done using the syntax:
((resource-thumb:myphoto.jpg|Resource Description))
Similarly, by default for resources like PDFs, epub's, etc., the resource tag inlines the whole resource into the page, if instead one wants a clickable link to a page where the resource is displayed one can use the syntax:
((resource-link:my_document.pdf|Resource Description))
Comma separated value files (.csv or CSV files) are inlined into a page as a table. Which rows and columns of the CSV to present in this table can be controlled by the resource line. The general format for including a CSV resource is:
((resource:resource_name.csv#config#top_left_cell#bottom_right_cell|Resource Description))
For example,
((resource:resource_name.csv##B2#C3|Resource Description))
might output
I.e., just the portion of the CSV given by the rectangle between the cells B2 and C3. Using a config directive we can omit the spreadsheet row and column headings as follows:
((resource:resource_name.csv#noheadings#B2#C3|Resource Description))
which might output
CSV spreadsheet files can also be used to output a variety of charts. The general format for the command to insert a chart resource is:
((resource-chart_type:resource_name.csv#char_config#x_start#x_end#y_start#y_end|Resource Description))
Here chart_type can be one of bargraph , linegraph , or pointgraph . For example, one might have a line like:
((resource-bargraph:resource_name.csv##B1#B4#C1#C4|Quadratic Function))
which could produce a chart like
In the above example, the values for the x coordinates would come from the cells B1, B2, B3, B4 from resource_name.csv and the values for the y coordinates would come from cells C1, C2, C3, C4 from resource_name.csv . Alternatively, rather than use a CSV to get out data we can just list the points we want to plot with a command like:
((resource-bargraph:##(1,1)#(2,4)#(3,9)#(4,16)|Quadratic Function))
If the QRENCODE variable has been set in src/configs/LocalConfig.php to the path of a working copy of the qrencode command, then QR code resources can be displayed on wiki pages. Such a resource has the format:
((resource-qr:url-to-qr-encode|A description of the qr code))
For example, if Yioop has been appropriately configured below one should see a QR code for https://www.seekquarry.com/

## Manipulating Page Resources

A list of media that have already been associated with a page appears under the Page Resource heading below the textarea. This table allows the user to rename and delete resources as well as insert the same resource at multiple locations within the same document.
The resources section of the edit page can be thought of as similar to a folder in Windows or MacOS. One can have subfolders of the resource folder.
The Places dropdown at the top of the Page Resource section name has the name of the current subfolder of the resource folder one is in, and allows you to navigate up folders to the root resource folder.
The View selection gadget allows you to control whether you want to view the resource items in the current folder as a list, as a grid, or in a detail mode. If you are in detail mode then the currently selected appears in a "details" top panel; whereas, all other items in the folder appear beneath it in a horizontal list. the details item consists of an icon, size, modified date, etc details. One can also configure to have a short text description display under the item. To do this enter edit mode, click on an item and type the description.
The Sort dropdown (up-down arrows) allows you to control the order in which media lists items are presented.
The Filter textfield lets you enter a search string. Clicking Go then shows only those resources which contain that search string in their title.
The Clipboard icon is used to toggle showing the user's clipboard. The clipboard can be used to move items around the folder structure. In edit mode, when a resource item is clicked on, it becomes a text field with three options: Rename, Copy Clipboard, and Cut Clipboard. The latter two can be used to either copy the item to the clipboard folder or to move it there. Once in the clipboard, the user can move to a different folder and paste the item as desired. Alternatively, the user can delete the clipboard's contents.
The Actions dropdown (labelled ...) can be used to create new folders, new text files, and new csv text files within the current page resource folder. These are initially named beginning with untitled followed by some number, and if applicable a file extension. In the dropdown there is also an option to upload a file to the current resource folder.
The Name , Size , Modified header links above the resources list control the sort order for the resource list. If a page is a media list page, then even in read mode, the sort order selected is remembered when drawing the media list.
Resources entries for the resources list consist first of an icon. In edit mode, when clicked on, they become a textfield with a name for the resource, followed by buttons for actions that can be done to that resource (Rename, Add to Page, Clip Cut, Clip Copy). If a resource is editable the icon will look like a plus sign together with a pencil. Clicking on the icon will then let you edit the resource.

### Text and CSV Resources

For normal text files clicking edit will bring up a textarea with the context of the text to edit. For CSV (comma separated value) files this will present the file as an editable spreadsheet. Yioop spreadsheets can have equation much like Excel spreadsheets. Clicking on a cell lets one edit its contents. For example, if in the cell A3 one entered the equation:
 = A1+A2

then clicking out of the cell would cause it to refresh with the value of the sum of the contents of cells A1 and A2. In addition, to the standard arithmetic operators ['*', '/', '+', '-', '%'], the spreadsheet expressions can use float or integer literals, and can make use of the following table of built-in functions:
Function Name Description
avg(x1,...,xn), avg(x1:xn) computes average of values of cells listed as arguments
ceil(x) rounds the value of x up to nearest integer
cell(i,j) returns the contents of the cell with column name of letter j, and row name i. For example, cell(2,'B') would return the contents of cell B2.
col(value, search_row, start_col, end_col) searches the row search_row between the columns start_col , end_col for value . Returns the column name where this value was found or -1 if not found. For example, col(3, 2, "B", "D") might return C if the cell C2 had value 3.
exp(x) computes e^x
floor(x) rounds the value of x down to the nearest integer
log(x) computes log x
min(x1,...,xn), min(x1:xn) computes minimum value of cells listed as arguments
max(x1,...,xn), max(x1:xn) computes maximum value of cells listed as arguments
pow(x,y) computes x^y
row(value, search_col, start_row, end_row) searches the column search_col between the rows start_row , end_row for value . Returns the row name where this value was found or -1 if not found. For example, row(3, "C", "1", "5") might return 2 if the cell C2 had value 3.
sqrt(x) computes sqrt(x)
sum(x1,...,xn), sum(x1:xn) computes sum of values of cells listed as arguments

### HTML, PDF and EPub Resources

How HTML, PDF, EPub resources included on a page render depends on how the Yioop wiki software has been configured. If no special configuration has been done, then HTML and PDF documents will bbe rendered in an <iframe> tag within the current wiki page. In the EPub, case a link to download the resource will be given. If the wiki software detects the presence of the file APP_DIR/scripts/epubjs-reader (epubjs-reader), the wiki system will render the resource in a Javascript viewer and will do things like remember reading position.

### Video and Audio Resources

Not all browsers support the same video and audio formats for playback. For this reason it sometimes is useful to have multiple video resources for the same video. For example, you might have a .ogv and .vp8 version of the same video recording. In read (non-edit) mode, the Yioop wiki system displays only one link for video or audio files that have the same name except for extension. It then includes the grouped file as separated <source> tags within either the <video> or <audio> html tag used to render the item in the browser. In this way, you can make your media take best advantages to whatever capabilities your client's browser has. If you don't feel like recoding your media in such a fancy way, a safe rule of thumb is that .mp3 audio will playback in all modern browser, and that .mp4 video will playback in all modern browser.
For video it is sometimes useful to add a subtitle or caption track. Yioop wiki supports WebVTT format subtitles and captions. To see how Yioop wiki makes use of these files, suppose you included a resource foo.mp4 in your wiki pages, and you also had a file named foo-captions-en-US.vtt then when the HTML page is generated from your wiki page, a <track> tag for the caption file would be added to the <video> tag. A user seeing this page would then see in the video player a closed caption symbol and be able to turn on/off (defaults off) the English captions. If you wanted named the file foo-subtitles-en-US.vtt instead, then Yioop wiki would include it as a subtitles track (defaults on). You can add captions/subtitle files for as many languages as desired.
When viewing the page resources for a page in edit mode, one can see one file/resource and no grouping of resources by name is done. In this way you can keep track of exactly what resources are available for a page.