Merge pull request #179997 from aahill/ta4h-char-update

updating character limit for TA4H

Author: PRMerger6

articles/cognitive-services/language-service/text-analytics-for-health/how-to/call-api.md

@@ -8,7 +8,7 @@ manager: nitinme
 ms.service: cognitive-services
 ms.subservice: language-service
 ms.topic: conceptual
-ms.date: 11/02/2021
+ms.date: 11/18/2021
 ms.author: aahi
 ms.custom: language-service-health, ignite-fall-2021
 ---
@@ -89,12 +89,14 @@ When using this feature asynchronously, the API results are available for 24 hou
 
 | Limit | Value |
 |------------------------|---------------|
-| Maximum size of a single document | 5,120 characters as measured by [StringInfo.LengthInTextElements](/dotnet/api/system.globalization.stringinfo.lengthintextelements). |
+| Maximum size of a single document | 30,720 characters as measured by [StringInfo.LengthInTextElements](/dotnet/api/system.globalization.stringinfo.lengthintextelements). |
 | Maximum size of entire request | 1 MB |
 | Max Documents Per Request | 10 for the web-based API, 1000 for the container. |
 
 If a document exceeds the character limit, the API won't process a document that exceeds the maximum size, and will return an invalid document error for it. If an API request has multiple documents, the API will continue processing them if they are within the character limit.
 
+When you send a document larger than 5,120 characters, it will be split by Text Analytics for health into chunks of 5,120 characters. If two entities are present on either side of a split that are related, the model will not be able to detect the relation. To prevent potential relations from being undetected, consider splitting your text into documents of 5,120 characters or less, consisting only of full sentences.
+
 ### Rate limits
 
 Your rate limit will vary with your [pricing tier](https://aka.ms/unifiedLanguagePricing). These limits are the same for both versions of the API. These rate limits don't apply to the Text Analytics for health container, which does not have a set rate limit.

articles/cognitive-services/language-service/whats-new.md

@@ -8,7 +8,7 @@ manager: nitinme
 ms.service: cognitive-services
 ms.subservice: language-service
 ms.topic: overview
-ms.date: 11/16/2021
+ms.date: 11/18/2021
 ms.author: aahi
 ms.custom: ignite-fall-2021
 ---
@@ -19,6 +19,8 @@ Azure Cognitive Service for Language is updated on an ongoing basis. To stay up-
 
 ## November 2021
 
+* Based on ongoing customer feedback, we have increased the character limit per document for Text Analytics for health from 5,120 to 30,720.
+
 * Azure Cognitive Service for Language release, with support for:
     * [Question Answering (now Generally Available)](question-answering/overview.md) 
     * [Sentiment Analysis and opinion mining](sentiment-opinion-mining/overview.md)