xml-2.0.xml

<!--this is a charged creeper monster spawner defintion-->
<spawner>
<id>minecraft:creeper</id>
<unlocalizedName>silkspawners.chargedcreeper.name</unlocalizedName>
<color>dark_aqua</color>
<nbt_logic_0>{powered:1}</nbt_logic_0>
<permisionLevel>0</permisionLevel><!--no plugins are needed this allows per entity permsion level this determines whether or not the block can break at all-->
<harvestLevel>1</harvestLevel><!--this is virtual harvest level which will determine if the spawner simply breaks as normal or is harvestable note the block harvest level has to be >= to the actual harvest level-->

<!--this is for enchantments for denial per entity-->
<enchantments>
<ench>
<id>silk_touch</id>
<lvl>1</lvl>
</ench>
<exactEnchantments>false</exactEnchantments>
<enchantments>

<!--this is for silkspawners addon is liquid spawner for liquid spawners-->
<isLiquidSpawner>false</isLiquidSpawner><!--api note: this is additional data like this that will determine the defintion for isSpawner() in the api based on silkspawners only events and defintions-->
<blastResistence>10000</blastResistence><!--actual block property for vanilla spawners-->
<dropsEggs>false</dropsEggs><!--does this entry contain drops-->
<dropsBars>false</dropsBars>
</spawner>

<!--populate tabs and fill in the actual nbt for the spawner-->
<CreativeTabs>

<tabEntry>
<!--allows you to override the block-->
<blockId>minecraft:mob_spawner</blockId>
<id>creeper</id>
<nbt>{}</nbt>

<!--if it supports multi index spawners this will be applied-->
<spawnpotentials>
<entry>
<id>wither_skeleton</id>
<weight>1</weight>
</entry>
</spawnpotentials>

</tabEntry>

</CreativeTabs>

<blacklist>
<enabled>true</enabled>

<entity>
<id>rabbit</id>
<nbt_logic_0>{rabbitType:99}<nbt_logic_0>
</entity>
</blacklist>

<whitelist>
<enabled>false</enabled>
<entity>

</entity>
</whitelist>

<blocks>
<block>
<id>minecraft:mob_spawner</id>
</block>
</blocks>