---
title: Add processors to the indexing pipelines
slug: '2141'
canonical_url: https://docs.coveo.com/en/2141/
collection: coveo-for-sitecore-v5
source_format: adoc
---
# Add processors to the indexing pipelines
Here is a list of processors that you can add to your pipelines to perform various tasks.

## Adding a processor to `indexing.filterIndex.inbound`

The following code sample shows you how to filter out items from your search indexes.
In this case, the items named `__Standard Values` are excluded.
Normally, you won't need to adapt this code sample to make it work in your own environment.

```javascript
using System;
using Sitecore.ContentSearch;
using Sitecore.ContentSearch.Pipelines.IndexingFilters;

namespace Coveo.Demos.Pipelines
{
    public class ExcludeStandardValuesItemsProcessor : InboundIndexFilterProcessor
    {
        public override void Process(InboundIndexFilterArgs args)
        {
            // Here, we check whether the item being currently processed is a 'Standard Values' item. If so, we prevent it
            // from being indexed in the current search index.
            SitecoreIndexableItem item = args.IndexableToIndex as SitecoreIndexableItem;
            if (String.Equals(item.Item.Name, "__Standard Values", StringComparison.InvariantCultureIgnoreCase)) {
                args.IsExcluded = true;
            }
        }
    }
}
```

## Using the `coveoInboundFilterPipeline`

The advantage of using this pipeline over the Sitecore `indexing.filterIndex.inbound` pipeline is that its filters can be applied to specific Coveo indexes.
In other words, indexes can be included or excluded from a processor scope.

By default, a processor defined in this pipeline is applied to all Coveo indexes.
To apply a processor only to specific indexes, specify those indexes name under a `includedIndexNames` node as follows.

```xml
<processor type="Coveo.SearchProvider.InboundFilters.ApplySitecoreInboundFilterProcessor, Coveo.SearchProviderBase">
  <includedIndexNames hint="list">
    <indexName>Coveo_web_index</indexName>
  </includedIndexNames>
</processor>
```

To apply a processor to all but some specific indexes, specify those index names under a `excludedIndexNames` node as follows.

```xml
<processor type="Coveo.SearchProvider.InboundFilters.ApplySitecoreInboundFilterProcessor, Coveo.SearchProviderBase">
  <excludedIndexNames hint="list">
    <indexName>Coveo_master_index</indexName>
  </excludedIndexNames>
</processor>
```

> **Note**
>
> If an index is specified in both lists, the filter won't be applied to this index.

## Adding a processor to `coveoInboundFilterPipeline`

The following code sample shows how you can filter out items from your search indexes.
In this case, the items named `__Standard Values` are excluded.
Normally, you won't need to adapt this code sample to make it work in your own environment.

```javascript
using Coveo.Framework.Items;
using Coveo.SearchProvider.Pipelines;

namespace Coveo.Demos.Pipelines
{
    public class ExcludeStandardValuesItemsProcessor : AbstractCoveoInboundFilterProcessor
    {
        public override void Process(CoveoInboundFilterPipelineArgs args)
        {
            // The ShouldExecute(CoveoInboundFilterPipelineArgs) tests whether the code should be executed.
            // It will return false if p_Args.IsExcluded is true or if the current index is excluded.
            if (ShouldExecute(p_Args)) {
                // Here, we check whether the item being currently processed is a 'Standard Values' item. If so, we prevent it
                // from being indexed in the current search index.
                IIndexableWrapper item = args.IndexableToIndex;
                if (String.Equals(item.Item.Name, "__Standard Values", StringComparison.InvariantCultureIgnoreCase)) {
                    args.IsExcluded = true;
                }
            }
        }
    }
}
```