Wiki is organized as a tree of pages in which each page may contain many sub-pages. The hierarchy is reflected on UI by the Breadcrumb and the page tree at the left pane. When a page is added, it is always defined as a sub-page to the current one. Wiki is a wiki platform which can host several wikis. So, you can have wikis for portals, wikis for groups or users. However, the page hierarchy is not reflected in the URLs as they are flatly accessible by their URLs.

Spaces represent a partitioning of Wiki data. A space is a set of pages. So, the space partitioning means they are independent trees. This separation is to enable Wiki to provide silos of knowledge for different interest groups.

There are 3 types of spaces:

There are two ways to create a page:

The first way

In this way, you need to use the toolbar.

1. Go to a Wiki space in which you want to create a page.

2. Click Add Page and select Blank Page or From Template... from the drop-down menu if you want to use an available template.

If you select From Template..., a list of available templates appears.

You can:

i. Click Preview corresponding to the template you want to see. The template preview appears:

ii. Click Select corresponding to the template you want to select for your new page.

The selected template appears:

3. Enter the title for your page. The page title must be unique.

4. Enter the content for your page by using Wiki Markup or the Rich Text editor.

5. Optionally, click Preview to see how your page looks like.

6. Click Save to finish.

The second way

In this way, you need to use the undefined link in a page.

In the Wiki application of eXo Platform, you can add a link pointing to a page which you are going to create later. Such links are called undefined links. These links are often used to remind other Wiki users to create the page.

Add an undefined link for creating a page later

1. Add a link by typing the page title between square brackets '[[...]]' or '[.... ]' (depending on your selected syntax) into your page body.

For example:

Syntax	What you type	What you get
Xwiki 2.0	[[eXo User Guide]]
Confluence 1.0	[eXo User Guide]

2. Click Save to save the page containing the link. The undefined link is colored in red with the underline.

3. Click the created red link to open the 'Add Page' form.

4. Follow the steps stated above to enter the page title, content, and save the page.

You can edit a page at any time provided that you have the edit permission on that page.

To edit a page, click Edit in the Page Control area. Your page will switch to the Edit mode.

Now, you can rename the page and edit the page content. The toolbar in the edit mode will be changed to activate the following actions.

Details:

Item	Description
	Switch to the Rich Text (WYSIWYG) editor.
	Open the Wiki syntax help page.
	Display the preview mode of the currently edited content. Previewing a page helps you verify the result of rendering the markup you just entered without saving.
	Show more syntax help.
	Input the edit reason if neccessary.
	Save the current page and go back to the view mode.
	Save the current page without sending notification to the watcher.
	Discard the current changes and go back to the view mode.

1. Select the page that you want to move.

2. Click More in the Page Control area, then select Move Page from the drop-down menu.

The form to select the destination page appears.

3. Select the destination page.

4. Click Move to commit.

1. Open the page you want to delete and select More in the Page Control area.

2. Click Delete Page from the drop-down menu.

3. Click OK in the confirmation message to accept your deletion.

Viewing page information is accessible to users who have the View permission on that page. The page information provides you all details about related pages of the current page, the hierarchy structure of the current page, the page history, and more.

1. Select the page you want to view the information.

2. Click More from the page toolbar, then select Page Info from the drop-down menu.

All information of the opening page, including page summary, related pages, page hierarchy, recent changes, will be displayed.

View a page history

To access the page history, just click View Page History in the Page Info view.

The History Page appears.

Details:

Area	Function
	Compare selected page versions.
	Allow you to select two versions that you want to compare.
	Allow you to specify the number of versions of the page and view a specific version.
	The date and time when the page is changed.
	The authors who make changes of the page.
	The summary of reasons why the changes are done. It is optional.
	Restore a page to the current version.

Watching a page allows you to receive a notification message about any additions in the page.

1. Open the page you want to view attachments.

2. Click Attachment(s) link from the Page info at the bottom right corner of the opening page.

There are two ways to add an attachment to a page:

The first way

In this way, you need to use the attachment pane at the bottom of the page.

1. Click the Upload New File field. The upload window will appear.

2. Select a file from your local device and click the Open button. The file will be uploaded automatically then.

The second way

In this way, you need to use the WYSIWYG editor (Rich Text editor).

1. Select a page to which you want to add an attachment.

2. Select Edit at the Page Control area. For more details, see the Edit a page section.

3. Select the Rich Text editor on the page toolbar.

4. Click on the toolbar of the Rich Text editor, then select Attached File... from the drop-down menu.

The Link form is displayed as below.

5. Select a file to upload by doing one of two following cases:

i. Double-click Upload new file or click Upload new file --> Select in the Current page or All pages tab.

ii. Click Browse to select a file from your local device, then click Upload.

The form to edit the link parameters appears.

6. Edit the link parameters by typing the label and the tooltip for the link.

7. Click Create Link to commit.

The uploaded file will be in the undefined link format. By clicking this link, you can create a new page.

To delete an attachment, just click corresponding to the attachment.

To download an attachment, just click the name of the attached file.

1. Click on the text editor, then click Insert Image...

2. Select an inserted image of the current page or click the All Pages tab to select an image attached to another page in the space.

3. Click Insert Image.

To view a specific version of a page, just click a version number in the Page History page. The selected version of that page will be displayed.

At a version of the page, you can do the following actions:

Item	Description
	Compare the current version with the selected one.
	Replace the current version with the selected version.
	Go to the Page History page.
Prev	View content of the previous version.
Next	View content of the next version.

Wiki tracks histories of changes to pages by maintaining a version of the page each time it is modified. To compare two versions, select two checkboxes corresponding to each relevant version, then click .

A page which shows the changes between these two versions will be displayed.

The changes between two versions will be marked with colors:

When you notice that there are changes in the current page version that you are not satisfied, you can rollback to an older version of that page quickly.

To restore an older version, click corresponding to your desired version in the Page History page.

1. Enter a key word in the search box.

2. Select your desired page or space from the drop-down menu. You will be redirected to the selected page or space.

The Advanced Search function allows you to search with a key word in a specific space. This mode helps you limit the search results.

1. Enter a key term into the search box and hit the Enter key.

If the results are matched with the key word, the search results are displayed like the illustration below.

If no results matched with the key words, the search screen informs "there is no search result...!"

2. Click to select a space from the drop-down menu to define a scale where to search for the entered word.

3. Click Search.

For each space, you can manage page templates and change the syntax used.

Wiki gives you the choice to make a space or an individual page to be open or restricted to specific users, groups or memberships. There are two levels of permissions in Wiki: Space Permissions and Page Permissions.

Manage a page template

When adding a new page, you are not required to write the content from scratch. You can start by selecting a page template which is actually a Wiki page with predefined contents.

In the Space Settings form, select the Template tab, and the form to manage templates appears.

Details:

Item	Description
	Search for a template.
	Create a new template.
	Edit a template.
	Delete a template.

Search for a template

This feature allows you to find your desired template quickly from the existing list as follows:

1. Input a word included in the title of your desired template in the Search textbox.

2. Press the Enter key; Or click the Search button next to the textbox to start your search.

All matching results which contain your entered search term are displayed right below the textbox.

Note

The Search function is only performed by the template titles, and you must enter a complete word into the Search textbox. For example, to find the template whose title contains "daily report", you can input "report" rather than "repo", or "daily" rather "ly".

Create a new template

1. Click Add more... in the Spage Settings page and the sample template form appears.

2. Add the title for the template.

3. Write the description in the Description....

4. Write the content for the template.

5. Select the Syntax to write the content.

6. Click Save Template at the Page Control area. A message will inform your successful template creation.

Edit a template

1. Click the Edit icon corresponding to the template you want to edit.

2. Change the title, the description, the content as you want.

3. Click Save Template at the Page Control area.

Delete a template

1. Click corresponding to the template you want to delete.

2. Click OK in the pop-up confirmation message.