Map Links

Map links enable you to link topics in a map based on their parent-children relationship in the map structure. Changing a map link can change how the content is ordered depending on the output.

Overview

You create map links by using the appropriate map structure and the collection-type attribute.

The collection-type attribute can take the following values:

sequence value: Generates an ordered list of links from parent to children. The order of links is the same as the order of topics in the map.
unordered value: Generates an unordered list of links from parent to children. The order of links is the same as the order of topics in the map.
family value: Generates an unordered list of links from parent to children and from sibling to sibling. The order of links is the same as the order of topics in the map.
choice value: Uncommon and typically used in custom outputs that enable the user to select one child topic to continue. In most cases, it is rendered in the same way as the unordered value.

Map linking — Figure 1. Map Links Operation.
The following example shows that:
Task B is a process topic with the collection-type attribute set to the sequence value.
Task B will link to Task C, Task D, and Task E in the output.
The linked topics will not link to each other outside the map.

Use Cases

Consider using map links in the following situations:

When you want to create a process topic based on map links
Figure 2. Process Map Structure.
The following example shows that:
There are three procedures appended under the “Process A” topic.
The “Process A” topic has the collection type attribute assigned
Figure 3. Rendered Process Topic.
The following PDF example shows a sample process of the structure visible in Process Map Structure.
When you want to enhance navigation between certain sections in a web format like webhelp

Maintenance Considerations

Keep the following considerations in mind when working with map links:

Map links do not limit topic reuse because you link topics on a map level.
Map links are based on map structure. If you change the map structure, they links will be updated.

Publishing Considerations

Keep the following considerations in mind when publishing map links:

Map links resolve at publish and link text is populated with the topic titles.
If you publish to a print-friendly output (for example, PDF), links may reference a page number.
You must use the DITA Open Toolkit and set the args.rellinks parameter to all.

Configure Map Linking

You configure map linking by assigning the appropriate collection-type attribute values.

In the Content Library, double-click a map to open it in the Content Editor.
Set the collection-type attribute of the parent topic by doing the following:
1. In the pane on the left, hover over the parent topic and click the wrench icon.
2. From the collection-type drop-down list, select a value.
  The collection-type attribute can take the following values:
  sequence value
  Generates an ordered list of links from parent to children. The order of links is the same as the order of topics in the map.
  unordered value
  Generates an unordered list of links from parent to children. The order of links is the same as the order of topics in the map.
  family value
  Generates an unordered list of links from parent to children and from sibling to sibling. The order of links is the same as the order of topics in the map.
  choice value
  Uncommon value used in custom outputs that enables the user to select one child topic to continue. In most cases, it is rendered in the same way as the unordered value.

Important:

Linking created by adjusting the collection-type attribute is compatible with the DITA Open Toolkit (DITA-OT) publishing scenarios with the args.rellinks parameter set to all, and Heretto Portal publishing. It is not compatible with Heretto PDF Generator publishing.

Figure 4. Rendered Process Topic.
The following PDF example shows that:
The “Process A” topic is a parent of the “Procedure A”, “Procedure B”, and “Procedure C” topics.
The “Process A” topic has the collection-type attribute set to the sequence value.

Under maintenance

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