How can I create a node that includes taxonomy fields using the REST service?

Replace:

'field_taxonomy_term_here[und][0][tid]' => $help,

With

'field_tags[und]' => 'MyTag'

Where MyTag is the name of your tag and tags is the name of the vocabulary list. (The tag should have been added to this already).

For me this only works if the taxonomy field is set to freetagging.
Have you managed to add a node with a term attached that is selected from a list?

I have posted a link there that may or may not be helpfull. If you could share your code of node.js and node_edit.js I would be very grateful.

OK never mind I've got it working. What I did was to print out $_POST and make a JSON String out of it. This only worked for me when previewing a node, not when submitting it. Then I took that json string and built a test with jQuery.ajax(). What could be interesting there for you is that jQuery translates sends the json string as url encoded by default wich is where you then can get the right syntax from.

field_stichworte is a taxonomy field with tagging. url-encoded: field_stichworte[und]:Führerschein
field_aa_berufsfelder is a taxonomy field set to show a select list. url-encoded: field_aa_berufsfelder[und][]:3

Here once with jquery sending the data as json and once urlencoded:

$(document).ready(function() {

var jsonObjects = {title:"my title",type:"arbeitsangebot",field_aa_berufsfelder:{und:["3"]},field_arbeitsbeschreibung:{und:[{value:"ab"}]},field_anforderungen:{und:[{value:"anf"}]},field_stichworte:{und:"F\u00fchrerschein"},field_arbeitsort:{und:[{name:"Von zu Hause aus",street:"Mystreet. 23",additional:"",postal_code:"76344",city:"Eggenstein",country:"de",locpick:{user_latitude:"49.080864",user_longitude:"8.392010"}}]},field_arbeitszeitraum:{und:[{show_todate:"1",value:{date:"2012\/06\/24",time:"12:15"},value2:{date:"2012\/06\/24",time:"22:15"},rrule:{FREQ:"WEEKLY",daily:{byday_radios:"INTERVAL",INTERVAL_child:"1"},weekly:{INTERVAL:"1"},monthly:{day_month:"BYMONTHDAY_BYMONTH",BYMONTHDAY_BYMONTH_child:{BYMONTHDAY:"1"},BYDAY_BYMONTH_child:{BYDAY_COUNT:"+1",BYDAY_DAY:"SU"}},yearly:{INTERVAL:"1",day_month:"BYMONTHDAY_BYMONTH",BYMONTHDAY_BYMONTH_child:{BYMONTHDAY:"1"},BYDAY_BYMONTH_child:{BYDAY_COUNT:"+1",BYDAY_DAY:"SU"}},range_of_repeat:"COUNT",count_child:"",until_child:{datetime:{date:""},tz:"Europe\/Paris",all_day:"1",granularity:"a:3:{i:0;s:4:\"year\";i:1;s:5:\"month\";i:2;s:3:\"day\";}"},exceptions:{EXDATE:[{datetime:{date:""},tz:"Europe\/Paris",all_day:"1",granularity:"a:3:{i:0;s:4:\"year\";i:1;s:5:\"month\";i:2;s:3:\"day\";}"}]},additions:{RDATE:[{datetime:{date:""},tz:"Europe\/Paris",all_day:"1",granularity:"a:3:{i:0;s:4:\"year\";i:1;s:5:\"month\";i:2;s:3:\"day\";}"}]}}}]},field_arbeitsdauer:{und:[{value:"10"}]},field_stundenlohn:{und:[{value:"10"}]},log:"send via ajax",path:{alias:""},comment:"2",name:"admin",date:"",status:"1"};

  $("#create-aa-json").click(function() {
    $.ajax({
      type : "POST",
      url : "http://mydomain.de/?q=drupalgap/node.json",
      mimeType: "application/json", 
      contentType: "application/json",
      data : JSON.stringify(jsonObjects),
    }).done(function( msg ) {
      alert( "Data Saved: " + msg );
    });
  });

  $("#create-aa-url").click(function() {
    $.ajax({
      type : "POST",
      url : "http://mydomain.de/?q=drupalgap/node.json",
      //dataType: "json",
      //mimeType: "application/json", 
      //contentType: "application/json",
      data : jsonObjects,
    }).done(function( msg ) {
      alert( "Data Saved: " + msg );
    });
  });


});

I ended up simply using json as when the data gets more complex urlencoded gets a little messy but both ways work.
Here is the file I was refering to: https://github.com/sDaniel/DrupalGap/blob/LocalMarket/drupalgap/services...

I don't use node reference but maybe the way described above will help you as well.

expanded question details

#2 did it for me, nice and simple. Thanks!

just a note. I am posting nodes via services from my ANDROID and iPHONE apps. And I was having trouble submitting Tax Terms as well. I ended up using rules. It turned out to be a fairly simple solution, but I am still very interested in other techniques.

What I did was just submit ordinary TEXT fields. I used rules to update a REFERENCE field based on that field.

Two Tricks to consider...
1...
The Obvious EVENT that I started was...
Before Saving Content. This did not work probably because I was comparing data that had not been saved yet.

The EVENT that worked was...
After saving new content of type

2...
When doing a REFERENCE FIELD, based on a TAX vocabulary, there is a sneaky, barely viewable option...
switch to direct input mode

It will give you a drop down of your Vocabulary... It rocks!!!!

#2 works for me .Thank you .

But if the vac has the same term name ( with two or more tid ) ,is has trouble .eq . in school ,class one --Math ; class two -- Math .

Or, Only write a php function api for this situation whih MySQL language.