# \[ModelingToolkit\] \[Symbolics\] Symbolic parameter metadata is erased if parameter is of type Term

**URL:** <https://discourse.julialang.org/t/modelingtoolkit-symbolics-symbolic-parameter-metadata-is-erased-if-parameter-is-of-type-term/90437>\
**Category:** Modelling & Simulations\
**Tags:** question, modelingtoolkit\
**Created:** [November 18, 2022, 11:37am UTC](https://discourse.julialang.org/t/modelingtoolkit-symbolics-symbolic-parameter-metadata-is-erased-if-parameter-is-of-type-term/90437 "2022-11-18T11:37:13Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![lxsilva](https://avatars.discourse-cdn.com/v4/letter/l/e495f1/32.png) [@lxsilva](https://discourse.julialang.org/u/lxsilva)\
**Post date:** [November 18, 2022, 11:37am UTC](https://discourse.julialang.org/t/modelingtoolkit-symbolics-symbolic-parameter-metadata-is-erased-if-parameter-is-of-type-term/90437/1 "2022-11-18T11:37:13Z")

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Hey guys,

not sure if the title was clear enough but I’ll try to illustrate the issue with code.

The code:

```nohighlight
@parameters p[1:2] u 

u = GlobalScope(u) #so parameter u will not be namescoped when one uses 'compose'
p = Symbolics.scalarize(p)
GlobalScope(p) #my GlobalScope version that intends to achieve the same but with array variables

pvec = [p;u] #this is what is supplied to the ODESystem constructor

pvec_ = Symbolics.value.(Symbolics.scalarize(pvec)) #this is run at some point inside the constructor

```

A first good question is how to add the GlobalScope() property to array variables. I figured that array variables are not used as defined but they have to be scalarized to a vector of Term variables and one can use the same mechanism to provide the GlobalScope property.

When adding all parameters to the ODESystem one creates a vector with both array and non-array parameters. Somewhere inside the constructor, the line `pvec_ = Symbolics.value.(Symbolics.scalarize(pvec))`. My question is why does the metadata of Term type parameters gets erased while the Sym type parameters is not.