> For the complete documentation index, see [llms.txt](https://docs.videc.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.videc.de/june5-3.7/en/webanwendung/datenquellen/datenquellen-durchsuchen.md).

# Search Data Sources

In JUNE5, only the system administrator can search data sources. This is done in the Data Sources section, which can be accessed from the menu on the right side of the screen using the Data Sources command. Subsequently, the Search Data Sources entry is called in the object list on the left.

To search measurements of a data source, you must click on the dropdown list field labeled *Data Source Selection*. A dropdown menu opens showing all configured data sources. Subsequently, you must select the desired data source from the listing. Once you have selected the desired data source, a split window area is displayed in the right area of the window. This split window area consists of two halves: the left and the right half. Each half displays a table and additional controls.

In the middle of both split window areas is the vertical dividing line, which allows you to adjust the width of both halves as desired.

To the left of the dividing line are two buttons. The upper button transfers the measurements marked by checkbox to the right half. The lower button, on the other hand, transfers all currently displayed measurements to the right half.

## Left Half (Measurements of the Data Source)

On the left half, the table with the measurements of the data source is displayed. Measurements of the data source are measurements provided by the connectors. These are determined at runtime.

To add or register measurements in the object model, these must first be placed in the table of the right half and then click the *Save* button. A measurement is placed in the table of the second half either individually, via drag and drop, or by clicking one of the two buttons to the left of the dividing line. When using the upper button, only the selected measurements are transferred. When using the lower button, all measurements of the data source are transferred to the table on the right half.

## Right Half (Measurements in the Object Model)

On the right half, the table with the measurements in the object model or pending measurements is displayed. Measurements in the object model are measurements that exist in the object model. The pending measurements are measurements that were transferred from the left table to the right and have not yet been saved. Pending measurements are marked in green.

To remove measurements from the object model, you must first select these, then click the *Remove Selected* button, and finally click the *Save* button.

## Additional Controls

Each split window area has controls in the upper area for *Filtering* or *Sorting* the measurements for its own area. The right half contains additional controls in the upper area with the following labels:

* **Change:** This button is used to undo changes
* **Remove Selected:** This button allows the transfer of marked measurements in the list of changes
* **Highlight Invalid:** As long as this checkbox is activated, measurements in the object model that no longer exist on the connected data source are highlighted in yellow.
* **Clean up:** Via the buttons, all invalid measurements in the object model are removed. An invalid measurement is a measurement that can no longer be assigned to a measurement of the data source.

## Error When Highlighting Invalid Measurements

If an error occurs when highlighting invalid measurements, the value \<FilterItemsLimitUrl>100\</FilterItemsLimitUrl> in the settings file "..\ProgramData\VIDEC\JUNE5\Configuration\SystemSettings\_V2.6.xml" must be set to a smaller value (50).

{% hint style="info" %}

* An invalid measurement is a measurement that can no longer be assigned to a measurement of the data source.
* If the checkbox *"Highlight Invalid"* is activated, invalid measurements are highlighted in yellow.
* Measurements from acron data sources cannot be added or removed from the object model through this menu item.
* Measurements from acron data sources can only be added or removed from the object model via *Synchronize* data sources.
  {% endhint %}


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