[DOCS] Removes index pattern from Discover docs (#118811) (#119212)

* [DOCS] Removes index pattern from Discover docs

* Update docs/discover/save-search.asciidoc

* Update docs/discover/save-search.asciidoc

* Update docs/discover/save-search.asciidoc

* Update docs/discover/search-for-relevance.asciidoc

* Update docs/discover/search-for-relevance.asciidoc

* Update docs/discover/view-document.asciidoc

* Update docs/user/discover.asciidoc

* Update docs/user/discover.asciidoc

* Update docs/user/discover.asciidoc

* Update docs/user/discover.asciidoc

* Update docs/user/discover.asciidoc

* Update docs/user/discover.asciidoc

* Update docs/user/discover.asciidoc

* Update docs/discover/search-sessions.asciidoc

Co-authored-by: Kaarina Tungseth <kaarina.tungseth@elastic.co>

* Update docs/discover/search-sessions.asciidoc

Co-authored-by: Kaarina Tungseth <kaarina.tungseth@elastic.co>

* Update docs/user/discover.asciidoc

Co-authored-by: Kaarina Tungseth <kaarina.tungseth@elastic.co>

* [DOCS] Adds bold to Document Explorer

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>
Co-authored-by: Kaarina Tungseth <kaarina.tungseth@elastic.co>

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>
Co-authored-by: Kaarina Tungseth <kaarina.tungseth@elastic.co>

docs/discover/save-search.asciidoc

@@ -8,7 +8,7 @@ and can also serve as a foundation for building visualizations.
 
 A saved search stores the query text, filters, and
 current view of *Discover*—the columns selected in the document table,
-the sort order, and the index pattern.
+the sort order, and the {data-source}.
 Saved searches are different from <<save-load-delete-query,saved queries>>, which
 are primarily used for storing query text and are available in any app with a query bar.
 
@@ -24,16 +24,12 @@ image::discover/images/read-only-badge.png[Example of Discover's read only acces
 [float]
 === Save a search
 
-. Once you've created a search worth saving, click *Save* in the toolbar.
+. Once you've created a search worth saving in *Discover*, click *Save* in the toolbar.
 . Enter a name for the search and click *Save*.
-+
-[role="screenshot"]
-image:images/discover-save-saved-search.png[Save saved search in Discover, width=50%]
-
 . To reload your search results in *Discover*, click *Open* in the toolbar, and select the saved search.
 +
-If the saved search is associated with a different index pattern than is currently
-selected, opening the saved search changes the selected index pattern. The query language
+If the saved search is associated with a different {data-source} than is currently
+selected, opening the saved search changes the selected {data-source}. The query language
 used for the saved search is also automatically selected.
 . To add your search results to a dashboard:
 .. Open the main menu, then click *Dashboard*.

docs/discover/search-for-relevance.asciidoc

@@ -8,9 +8,9 @@ This example shows how to use *Discover* to list
 your documents from most relevant to least relevant. This example uses
 the <<gs-get-data-into-kibana, sample flights data set>>, or you can use your own data.
 
-.  In *Discover*, open the index pattern dropdown, and select that data you want to work with.
+.  In *Discover*, open the {data-source} dropdown, and select that data you want to work with.
 +
-For the sample flights data, set the index pattern to *kibana_sample_data_flights*.
+For the sample flights data, set the {data-source} to *kibana_sample_data_flights*.
 
 .  Run your search.  For the sample data, try:
 +

docs/discover/search-sessions.asciidoc

@@ -1,20 +1,19 @@
 [[search-sessions]]
 == Run a search session in the background
 
-Sometimes you might need to search through large amounts of data no matter
-how long the search takes. While this might not happen often,
-there are times that long-running queries are required.
+Sometimes you might need to search through large amounts of data, no matter
+how long the search takes.
 Consider a threat hunting scenario, where you need to search through years of data.
+You can save a long-running search, so {kib} processes your request in the
+background, and you can continue your work.
 
-If your query is running long, you can save your search session, which
-allows {kib} to continue processing your request in the
-background.  Save your search session from *Discover* or *Dashboard*,
+Save your search session from *Discover* or *Dashboard*,
 and when your session is complete, view and manage it in *Stack Management*.
+Search sessions are <<search-session-settings-kb,enabled by default>>.
 
 [role="screenshot"]
 image::images/search-session.png[Search Session indicator displaying the current state of the search, which you can click to stop or save a running Search Session ]
 
-Search sessions are <<search-session-settings-kb,enabled by default>>.
 
 [float]
 ==== Requirements
@@ -37,19 +36,24 @@ open your browser and pick up where you left off.
 
 . Load your dashboard.
 +
-Your search session begins automatically. The icon after the dashboard title
-displays the current state of the search session. A clock indicates the search session is in progress.
+Your search session begins automatically.
+The icon after the dashboard title displays the current state of the search session.
+A clock icon indicates the search session is in progress.
 A checkmark indicates that the search session is complete.
 
-. To instruct {kib} to continue a search in the background, click the clock icon,
-and then click *Save session*. Once you save a search session, you can start a new search,
-navigate to a different application, or close the browser.
+. To continue a search in the background, click the clock icon,
+and then click *Save session*.
 +
 [role="screenshot"]
 image::images/search-session-awhile.png[Search Session indicator displaying the current state of the search, which you can click to stop or save a running Search Session, width=75% ]
++
+Once you save a search session, you can start a new search,
+navigate to a different application, or close the browser.
 
 . To view your saved searches, open the main menu, and then click
-*Stack Management > Search Sessions*.  You can also open this view from the search sessions popup for a saved or completed session.
+*Stack Management > Search Sessions*.
+For a saved or completed session, you can also open this view from the search sessions popup.
+
 +
 [role="screenshot"]
 image::images/search-sessions-menu.png[Search Sessions management view with actions for inspecting, extending, and deleting a session. ]
@@ -72,12 +76,11 @@ behaves differently:
 [float]
 ==== Limitations
 
-Certain visualization features do not fully support background search sessions. If a dashboard
-using these features is restored,
-all panels using unsupported features won't load immediately, but instead send out additional
+Some visualization features do not fully support background search sessions. When
+you restore a dashboard, panels with unsupported features won't load immediately, but instead
+send out additional
 data requests, which can take a while to complete.
-The warning *Your search session is still running* is shown.
-
+The *Your search session is still running* warning appears.
 You can either wait for these additional requests to complete or come back to the dashboard later
 when all data requests have finished.
 
@@ -89,7 +92,7 @@ A panel on a dashboard can behave like this if one of the following features is
 This is configurable in the *Advanced* section of the dimension.
 * An *intervals* dimension.
 
-**Aggregation based** visualizations
+**Aggregation-based** visualizations
 
 * A *terms* aggregation with an enabled *Group other values in separate bucket* setting.
 * A *histogram* aggregation.

docs/discover/view-document.asciidoc

@@ -27,7 +27,7 @@ you can create <<external-plugin-development, your own plugin>>.
 === View surrounding documents
 
 To inspect the documents that occurred immediately before and after a document,
-your index pattern must contain time-based events.
+your {data-source} must contain time-based events.
 
 . In the document table, click the expand icon (>).
 . In the expanded view, click **View surrounding documents**.

docs/management/advanced-options.asciidoc

@@ -320,7 +320,9 @@ Highlights results in *Discover* and saved searches on dashboards. Highlighting
 slows requests when working on big documents.
 
 [[doctable-legacy]]`doc_table:legacy`::
-Controls the way the document table looks and works. Set this property to `true` to revert to the legacy implementation.
+Controls the way the document table looks and works.
+To use the new *Document Explorer* instead of the classic view, turn off this option.
+The *Document Explorer* offers better data sorting, resizable columns, and a full screen view.
 
 [float]
 [[kibana-ml-settings]]

docs/user/discover.asciidoc

@@ -3,32 +3,22 @@
 
 [partintro]
 --
-**_Gain insight to your data._**
-
-*Discover* enables you to quickly search and filter your data, get information
-about the structure of the fields, and visualize your data with *Lens* and *Maps*.
-You can customize and save your searches and place them on a dashboard.
-
-++++
-<script type="text/javascript" async src="https://play.vidyard.com/embed/v4.js">
-</script>
-<img
-style="width: 100%; margin: auto; display: block;"
-class="vidyard-player-embed"
-src="https://play.vidyard.com/c2qBPz74BU16ncbvDWGvbz.jpg"
-data-uuid="c2qBPz74BU16ncbvDWGvbz"
-data-v="4"
-data-type="inline"
-/>
-++++
-
-[float]
-=== Explore and query your data
-
 You have questions about your data.
 What pages on your website contain a
 specific word or phrase? What events were logged most recently?
 What processes take longer than 500 milliseconds to respond?
+
+With *Discover*, you can quickly gain insight to your data: search and filter your data, get information
+about the structure of the fields, and display your findings in a visualization.
+You can also customize and save your searches and place them on a dashboard.
+
+[role="screenshot"]
+image::images/discover.png[A view of the Discover app]
+
+
+[float]
+=== Explore and query your data
+
 This tutorial shows you how to use *Discover* to quickly search large amounts of
 data and understand what’s going on at any given time.
 
@@ -43,9 +33,7 @@ that summarize the contents of the data.
 At the end of this tutorial, you’ll be ready to start exploring with your own
 data in *Discover*.
 
-
-[float]
-=== Prerequisites
+*Prerequisites:*
 
 - If you don’t already have {kib}, set it up with https://www.elastic.co/cloud/elasticsearch-service/signup?baymax=docs-body&elektra=docs[our free trial].
 - You must have data in {es}.  This tutorial uses the
@@ -64,12 +52,12 @@ Tell {kib} where to find the data you want to explore, and then specify the time
 
 . Select the data you want to work with.
 +
-{kib} uses a <<data-views, data view>> to tell it where to find
+{kib} uses a <<data-views,{data-source}>> to tell it where to find
 your {es} data.
-To view the ecommerce sample data, make sure the index pattern is set to **kibana_sample_data_ecommerce**.
+To view the ecommerce sample data, make sure the {data-source} is set to **kibana_sample_data_ecommerce**.
 +
 [role="screenshot"]
-image::images/discover-index-pattern.png[How to set the index pattern in Discover, width=50%]
+image::images/discover-data-view.png[How to set the {data-source} in Discover, width=50%]
 
 . Adjust the <<set-time-filter,time range>> to view data for the *Last 7 days*.
 +
@@ -101,7 +89,7 @@ image:images/find-manufacturer-field.png[Fields list that displays the top five
 
 . Click image:images/add-icon.png[Add icon] to toggle the field into the document table.
 
-. Find the `customer_first_name` and `customer_last_name` last name fields and add
+. Find the `customer_first_name` and `customer_last_name` fields and add
 them to your document table. Your table should look similar to this:
 +
 [role="screenshot"]
@@ -110,22 +98,22 @@ image:images/document-table.png[Document table with fields for manufacturer, cus
 . To rearrange the table columns, hover the mouse over a
 column header, and then use the move control.
 
-. To view more of the document table, click *Hide chart*.
+. To view more of the document table, click *Chart options > Hide chart*.
 
 [float]
 [[add-field-in-discover]]
-=== Add a field to your index pattern
+=== Add a field to your {data-source}
 
 What happens if you forgot to define an important value as a separate field? Or, what if you
 want to combine two fields and treat them as one? This is where {ref}/runtime.html[runtime fields] come into play.
-You can add a runtime field to your index pattern from inside of **Discover**,
+You can add a runtime field to your {data-source} from inside of **Discover**,
 and then use that field for analysis and visualizations,
 the same way you do with other fields.
 
-. Click the ellipsis icon (...), and then click *Add field to index pattern*.
+. Click the ellipsis icon (...), and then click *Add field to data view*.
 +
 [role="screenshot"]
-image:images/add-field-to-pattern.png[Dropdown menu located next to index pattern field with item for adding a field to an index pattern, width=50%]
+image:images/add-field-to-data-view.png[Dropdown menu located next to {data-source} field with item for adding a field to a {data-source}, width=50%]
 
 . In the *Create field* form, enter `hello` for the name.
 
@@ -166,7 +154,7 @@ refer to <<runtime-fields, Explore your data with runtime fields>>.
 
 One of the unique capabilities of **Discover** is the ability to combine
 free text search with filtering based on structured data.
-To search all fields, enter a simple string in the **Search** field.
+To search all fields, enter a simple string in the query bar.
 
 [role="screenshot"]
 image:images/discover-search-field.png[Search field in Discover]
@@ -236,14 +224,11 @@ You can bookmark this document and share the link.
 
 Save your search so you can repeat it later, generate a CSV report, or use it in visualizations, dashboards, and Canvas workpads.
 Saving a search saves the query text, filters,
-and current view of *Discover*&mdash;the columns selected in the document table, the sort order, and the index pattern.
+and current view of *Discover*&mdash;the columns selected in the document table, the sort order, and the {data-source}.
 
 . In the toolbar, click **Save**.
 
 . Give your search a title, and then click **Save**.
-+
-[role="screenshot"]
-image:images/discover-save-saved-search.png[Save saved search in Discover, width=50%]
 
 [float]
 === Visualize your findings