curl -s -n -G "https://www.example.com/confluence/rest/projectdoc/1/document.json?select=Name,Type&from=MYEXAMPLE&max-hit-count=100&expand=property&max-result=100" \
	--data-urlencode "where=$<Doctype>=[category] AND $<Type>=[Type1]" | jq .

{
  "size": 2,
  "start-index": 0,
  "max-result": 2,
  "id-list": "128816586,128816588",
  "document": [
    {
      "id": 128816586,
      "property": [
        {
          "name": "Name",
          "value": "<ac:structured-macro ac:name=\"projectdoc-transclusion-parent-property\" ac:schema-version=\"1\" ac:macro-id=\"e8c27607-adfd-42e4-ace2-c2474ac3771c\"><ac:parameter ac:name=\"add-link\">false</ac:parameter><ac:parameter ac:name=\"property-name\">Name</ac:parameter></ac:structured-macro> / <ac:structured-macro ac:name=\"projectdoc-transclusion-property-display\" ac:schema-version=\"1\" ac:macro-id=\"8f80206a-419f-47cd-a099-da64c676a21d\"><ac:parameter ac:name=\"property-name\">Short Name</ac:parameter></ac:structured-macro>",
          "controls": "<br />"
        },
        {
          "name": "Type",
          "value": "<ac:structured-macro ac:name=\"projectdoc-name-list\"><ac:parameter ac:name=\"doctype\">category-type</ac:parameter><ac:parameter ac:name=\"render-no-hits-as-blank\">true</ac:parameter><ac:parameter ac:name=\"names\">Type1</ac:parameter><ac:parameter ac:name=\"property-restrict-value-range\">true</ac:parameter><ac:parameter ac:name=\"property\">Type</ac:parameter></ac:structured-macro>",
          "controls": ""
        }
      ],
      "section": []
    },
    {
      "id": 128816588,
      "property": [
        {
          "name": "Name",
          "value": "<ac:structured-macro ac:name=\"projectdoc-transclusion-parent-property\" ac:schema-version=\"1\" ac:macro-id=\"ac8cd350-faef-4367-8750-3739d5535286\"><ac:parameter ac:name=\"add-link\">false</ac:parameter><ac:parameter ac:name=\"property-name\">Name</ac:parameter></ac:structured-macro> / <ac:structured-macro ac:name=\"projectdoc-transclusion-property-display\" ac:schema-version=\"1\" ac:macro-id=\"471c11ea-4ab7-4fc4-96f8-8c9b95a264ea\"><ac:parameter ac:name=\"property-name\">Short Name</ac:parameter></ac:structured-macro>",
          "controls": "<br />"
        },
        {
          "name": "Type",
          "value": "<ac:structured-macro ac:name=\"projectdoc-name-list\"><ac:parameter ac:name=\"doctype\">category-type</ac:parameter><ac:parameter ac:name=\"render-no-hits-as-blank\">true</ac:parameter><ac:parameter ac:name=\"names\">Type1</ac:parameter><ac:parameter ac:name=\"property-restrict-value-range\">true</ac:parameter><ac:parameter ac:name=\"property\">Type</ac:parameter></ac:structured-macro>",
          "controls": ""
        }
      ],
      "section": []
    }
  ]
}

 Double and triple check the result set! 

Make sure it is correct, as the changes in step 4 will be applied to the documents in this result set!

{
      "property": [
        {
          "name": "Type",
          "value": "<ac:structured-macro ac:name=\"projectdoc-name-list\"><ac:parameter ac:name=\"doctype\">category-type</ac:parameter><ac:parameter ac:name=\"render-no-hits-as-blank\">true</ac:parameter><ac:parameter ac:name=\"names\">Type2</ac:parameter><ac:parameter ac:name=\"property-restrict-value-range\">true</ac:parameter><ac:parameter ac:name=\"property\">Type</ac:parameter><ac:parameter ac:name=\"\" /></ac:structured-macro>",
          "controls": "",
          "position": "replace"
        }
      ]
}

The Web API Extension provides other options to change the value of a property. Please read below the Information on More Options to Change the Values.

querystring=$(urlencode -m id-list=12345678)"&"$(urlencode -m new-version=true)"&"$(urlencode -m comment=Changed using the WEB-API)
echo $querystring

curl -n --header "Content-Type: application/json" \
	-X PATCH "https://www.example.com/confluence/rest/projectdoc/1/document.json?"${querystring} \
	--data-binary @document.json

The name of the file in the file system must not contain the "@" symbol! It is only necessary for cURL.

 Check the result in Confluence regarding the change in the test page.

querystring=$(urlencode -m id-list=128816586,128816588)"&"$(urlencode -m new-version=true)"&"$(urlencode -m comment=Changed using the WEB-API)
echo $querystring

• This last line will apply the changes in the document document.json to all documents of id-list!
• There is no rollback or undo!
• The result will list for each page, whether it was a success or a failure.
• There is no rollback when the change failed to alter one or some documents! The not failing documents will have the change applied to them.

curl -n --header "Content-Type: application/json" \
	-X PATCH "https://www.smartics.eu/confluence-test/rest/projectdoc/1/document.json?"${querystrng} \
	--data-binary @document.json

• When some pages did not accept the change, but it succeeded for other pages: do not forget to remove those pages, which succeeded before you make a new attempt
• The recommendation is this: Analyse the error, reproduce it in a test environment (e.g. by copying some of these pages) and start with a new query to collect only those pages which did not succeed and try again