Element

<polymer-element name="st-pageable-content" attributes="urlTemplate appUrlTemplate dataname currentPage" extends="core-list">
	<template>
		<style>
			:host {
				display: block;
				height: 100%;
			}
		</style>

		<content></content>

		<st-pagination id="pager" on-st-pagination-changed="{{pageChanged}}"></st-pagination>

		<st-globals id="globals"></st-globals>
		<st-ajax dst="{{currentPageUrl}}"
				 id="ajax"
				 ticket="{{$.globals.authentication.authTicket}}"
				 method="GET"
				 on-core-response="{{_ajaxResponse}}"
				 on-core-error="{{_ajaxError}}"
				 on-core-complete="{{_ajaxComplete}}"
				 on-st-ajax-start="{{_ajaxStart}}">
		</st-ajax>


	</template>
	<script>
		Polymer({
		  
		  ......
		  
		});

	</script>

</polymer-element>	  

Using

<st-pageable-content style="height: 100%;" urltemplate="/Discussion/Page-{page}" appurltemplate="/discussion/{page}" data="{{data}}" currentpage="{{currentPage}}" dataname="discussion-message">

					<st-discussion-message data="{{model}}" scrolltarget="#messageSection"></st-discussion-message>

</st-pageable-content>