# How should I reference components of Header apps within H/D apps in logic blocks?

**URL:** <https://community.nextw.com/t/how-should-i-reference-components-of-header-apps-within-h-d-apps-in-logic-blocks/1694>\
**Category:** Nextworld Platform\
**Created:** [February 5, 2026, 5:49pm UTC](https://community.nextw.com/t/how-should-i-reference-components-of-header-apps-within-h-d-apps-in-logic-blocks/1694 "2026-02-05T17:49:03Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ian.p](https://sea1.discourse-cdn.com/flex001/user_avatar/community.nextw.com/ian.p/32/427_2.png) [@ian.p](https://community.nextw.com/u/ian.p)\
**Post date:** [February 5, 2026, 5:49pm UTC](https://community.nextw.com/t/how-should-i-reference-components-of-header-apps-within-h-d-apps-in-logic-blocks/1694/1 "2026-02-05T17:49:03Z")

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This screenshot shows two ways of referencing a component of Header app in a H/D:

1. The first involves selecting the H/D app, then `Field Location` = `Header` and then referencing the component you’re interested in.
2. The second involves selecting the Header app directly and then referencing the component you’re interested in.

As far as I know both seem to work. Are both supported? Is one preferable to the other?

 ![image](https://us1.discourse-cdn.com/flex001/uploads/nextworld/original/2X/a/a35e67ca9eb6e7fab323ef70e5a44f890e0cb630.png)

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<div class="post-metadata">

**Author:** ![ian.p](https://sea1.discourse-cdn.com/flex001/user_avatar/community.nextw.com/ian.p/32/427_2.png) [@ian.p](https://community.nextw.com/u/ian.p)\
**Post date:** [February 12, 2026, 5:39pm UTC](https://community.nextw.com/t/how-should-i-reference-components-of-header-apps-within-h-d-apps-in-logic-blocks/1694/2 "2026-02-12T17:39:47Z")

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I received advice internally that Nextworld’s official position is to always reference the H/D app in these scenarios. Referencing the header app is supported, but is considered an anti-pattern is discouraged from use.